{"id":45233,"date":"2025-12-09T10:49:48","date_gmt":"2025-12-09T10:49:48","guid":{"rendered":"https:\/\/www.bluehost.com\/blog\/?p=45233"},"modified":"2026-02-10T05:13:15","modified_gmt":"2026-02-10T05:13:15","slug":"401-error","status":"publish","type":"post","link":"https:\/\/www.bluehost.com\/blog\/401-error\/","title":{"rendered":"What Is a 401 Error? Most Common Causes and How To Fix It"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\" id=\"h-key-highlights\">Key highlights<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Understand what a 401 error means and how it impacts access to your WordPress site.&nbsp;<\/li>\n\n\n\n<li>Learn the most common causes of 401 errors, from expired cookies to plugin conflicts.&nbsp;<\/li>\n\n\n\n<li>Explore step-by-step solutions to troubleshoot and fix the error on your own.&nbsp;<\/li>\n\n\n\n<li>Know when it\u2019s time to contact your hosting provider for expert support.&nbsp;<\/li>\n\n\n\n<li>Uncover preventative tips to reduce the chances of future 401 errors.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p>Encountering a 401 error on your WordPress website can be quite frustrating. Reloading the page might help, but not always.&nbsp;&nbsp;<\/p>\n\n\n\n<p>So, what\u2019s a 401 Hypertext Transfer Protocol (HTTP) response code and what does it mean?&nbsp;&nbsp;<\/p>\n\n\n\n<p>A browser issue may cause this error, but in some rare cases, it could also be a server-side problem.&nbsp;&nbsp;<\/p>\n\n\n\n<p>The good news is that error 401 codes are often straightforward to fix. In fact, once you identify the source of the error, you may be able to fix it yourself. You could also contact a WordPress expert or your <a href=\"https:\/\/www.bluehost.com\/contact\">host\u2019s customer support team<\/a> to resolve the problem.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Keep reading to learn the causes of 401 errors and how to troubleshoot and prevent them.&nbsp;&nbsp;Many users ask what is 401 error code because it often appears without much context, leaving them unsure if the problem is on their end or the server\u2019s side.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-a-401-error\">What is a 401 error?<\/h2>\n\n\n\n<p>Error 401 is an HTTP status code that indicates your client (or browser) doesn&#8217;t have the required permissions to access a particular online resource or webpage due to invalid authentication. This standard response code may also show when your browser fails to give valid credentials when attempting to access a requested resource.<\/p>\n\n\n\n<p>This error is often a direct result of an issue on the client side. That means there was a bad request from your browser to the server without proper authentication.&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1598\" height=\"1015\" src=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page.jpg\" alt=\"Sample Error 401 page.\" class=\"wp-image-45241\" srcset=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page.jpg 1598w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page-300x191.jpg 300w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page-1024x650.jpg 1024w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page-768x488.jpg 768w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page-1536x976.jpg 1536w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page-24x15.jpg 24w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page-36x23.jpg 36w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Sample-Error-401-page-48x30.jpg 48w\" sizes=\"100vw\" \/><\/figure>\n\n\n\n<p>When your browser throws this error, it may result from attempting to access a website using an invalid <a href=\"https:\/\/www.bluehost.com\/blog\/what-is-a-url\/\">URL<\/a>, incorrect username or password or an expired browser cache.<\/p>\n\n\n\n<p>Most times, fixing client-side errors can resolve the issue fast. In other cases, the issue may be on the server side, where the web server blocks valid attempts by the client to access a requested resource.&nbsp;<\/p>\n\n\n\n<p>This may result from deliberate changes a user made to the server or an accidental failure in the authentication procedure.<\/p>\n\n\n\n<p>When you face this problem, your browser will display an error message. Different platforms give different titles to the 401 error. Here are examples of what you may see:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>401 authorization required<\/li>\n\n\n\n<li>401 unauthorized error<\/li>\n\n\n\n<li>Error 401 unauthorized<\/li>\n\n\n\n<li>HTTP error 401 \u2013 unauthorized<\/li>\n\n\n\n<li>HTTP 401<\/li>\n\n\n\n<li>Access denied<\/li>\n<\/ul>\n\n\n\n<p>The error code is the most crucial factor here, not the text variations around it. No matter what your browser displays, the error code tells you the problem you&#8217;re facing. It&#8217;s also the key to your solution.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-are-the-causes-of-401-errors-on-a-wordpress-website-nbsp\">What are the causes of 401 errors on a WordPress website?&nbsp;<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes.png\" alt=\"The common causes of 401 errors on WordPress websites.\" class=\"wp-image-45240\" srcset=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes.png 1920w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes-300x169.png 300w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes-1024x576.png 1024w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes-768x432.png 768w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes-1536x864.png 1536w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes-24x14.png 24w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes-36x20.png 36w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/401-error-common-causes-48x27.png 48w\" sizes=\"100vw\" \/><\/figure>\n\n\n\n<p>Before exploring potential fixes, let&#8217;s dive deeper into why your WordPress website may be throwing the 401 error code.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-incorrect-urls\">1. Incorrect URLs<\/h3>\n\n\n\n<p>Everyone is guilty of the occasional typo. Typing the wrong URL (Uniform Resource Locator) into the address bar can cause problems, from misdirection to 401 errors.&nbsp;<\/p>\n\n\n\n<p>What if the URL is correct? Maybe the page has been moved or deleted, and you\u2019re attempting to access an outdated page.&nbsp;<\/p>\n\n\n\n<p>The server may reject your request in both cases because the client tries to access the resource you want through an unauthorized or invalid path.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-expired-cache-and-cookies\">2. Expired cache and cookies<\/h3>\n\n\n\n<p>Your browser uses <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/HTTP\/Cookies\" target=\"_blank\" rel=\"noreferrer noopener\">HTTP cookies<\/a> to store browser data on your memory, and cookies \u201cremember\u201d your device and browser. Cookies and the <a href=\"https:\/\/www.bigcommerce.com\/ecommerce-answers\/what-browser-cache-and-why-it-important\/\" target=\"_blank\" rel=\"noreferrer noopener\">browser cache<\/a> are essential to a fast browsing experience.&nbsp;<\/p>\n\n\n\n<p>Modern cookies also store your authentication status. That way, you no longer have to log in every time to access a website or social media. Browser cookies keep your online session active while ensuring the server sends you information based on your authorization level.<\/p>\n\n\n\n<p>If your cookies expire or your cache is corrupted or cleared, you may receive a 401 unauthorized error because of improper authentication.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-firewall-and-plugin-configurations\">3. Firewall and plugin configurations<\/h3>\n\n\n\n<p>If you\u2019ve just installed a new plugin or <a href=\"https:\/\/www.bluehost.com\/blog\/how-to-use-a-firewall-to-boost-your-website-security-against-attacks\/\">firewall on your WordPress site<\/a>, attempts to access certain pages may throw 401 errors.&nbsp;<\/p>\n\n\n\n<p>For instance, some <a href=\"https:\/\/www.bluehost.com\/blog\/best-wordpress-security-plugins\/\">security plugins<\/a> may take complete control of your website and restrict access to certain pages, even when you have administrator access.&nbsp;<\/p>\n\n\n\n<p>As the plugin runs diagnostics on your website to optimize it, any login attempts may be perceived as malicious activity. That may cause your website to display a 401 error page.<\/p>\n\n\n\n<p>Also, misconfiguring <a href=\"https:\/\/www.bluehost.com\/blog\/guide-to-wordpress-plugins\/\">WordPress plugins<\/a> can cause error 401, especially if you\u2019re handling a new plugin for the first time.&nbsp;<\/p>\n\n\n\n<p>Some WordPress security plugins may inadvertently block authorized users, causing 401 errors. To avoid these issues, consider using <a href=\"https:\/\/www.bluehost.com\/wordpress\/solutions\">Bluehost WordPress Solution<\/a>, which provides optimized configurations for security and access management. If you\u2019re setting up a new website, the <a href=\"https:\/\/www.bluehost.com\/blog\/wordpress-ai-website-builder\/\">Bluehost AI Site Creation Tool<\/a> helps create a WordPress site with security best practices, reducing access issues from the start.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-protected-urls\">4. Protected URLs<\/h3>\n\n\n\n<p>Access to specific URLs may be strictly controlled or managed at the server level. Only authorized personnel can access these restricted resources. In such a case, attempting to access such a URL from an unauthorized web browser may throw an error 401.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-htaccess-file-restrictions\">5. .htaccess file restrictions<\/h3>\n\n\n\n<p>.htaccess files allow you to change the configuration of a directory within a website. Suppose a .htaccess file comes with password protection directives. Unless you have the password, you may encounter a 401 unauthorized access error.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-troubleshoot-401-errors-nbsp\">How to troubleshoot 401 errors?&nbsp;<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors.png\" alt=\"Follow these steps to troubleshoot your 401 error.\" class=\"wp-image-45242\" srcset=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors.png 1920w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors-300x169.png 300w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors-1024x576.png 1024w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors-768x432.png 768w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors-1536x864.png 1536w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors-24x14.png 24w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors-36x20.png 36w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Troubleshooting-401-errors-48x27.png 48w\" sizes=\"100vw\" \/><\/figure>\n\n\n\n<p>As we\u2019ve covered above, a 401 error is often a client-side rather than a server-side issue. For that reason, it&#8217;s often straightforward to fix. <\/p>\n\n\n\n<p>Here are several solutions you may attempt:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th><strong>Issue<\/strong><\/th><th><strong>Possible cause<\/strong><\/th><th><strong>Fix<\/strong><\/th><\/tr><tr><td>Login fails despite correct credentials<\/td><td>Expired session, cache issue<\/td><td>Clear cookies, restart session<\/td><\/tr><tr><td>401 after plugin installation<\/td><td>Security plugin blocking access<\/td><td>Deactivate security plugins temporarily<\/td><\/tr><tr><td>API integration fails<\/td><td>Missing authentication headers<\/td><td>Verify API key and permissions<\/td><\/tr><tr><td>Website page shows 401 randomly<\/td><td>Outdated DNS cache<\/td><td>Flush DNS using command line<\/td><\/tr><tr><td>Page access denied despite admin login<\/td><td>.htaccess restrictions<\/td><td>Review and update .htaccess file<\/td><\/tr><tr><td>401 error after switching themes<\/td><td>Theme security settings blocking access<\/td><td>Revert to the previous theme or check theme settings<\/td><\/tr><tr><td>Multiple failed login attempts leading to 401<\/td><td>Security plugin locked admin access<\/td><td>Reset login via phpMyAdmin<\/td><\/tr><tr><td>Accessing a website with an incorrect username or password<\/td><td>Lacks valid authentication credentials<\/td><td>Check your login credentials<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-verify-the-url\">1. Verify the URL<\/h3>\n\n\n\n<p>One of the simplest fixes for error 401 is checking whether the URL used in your browser\u2019s address bar is valid or correct. To secure a website, servers reject attempted access from invalid or incorrect URLs, often due to entering a wrong username or password.&nbsp;<\/p>\n\n\n\n<p>First, ensure the URL is spelled correctly. Check if your target URL has special characters, hyphens and the correct extension. If everything checks out, you should now access the website without problems.&nbsp;<\/p>\n\n\n\n<p>If you still face error 401, see if the page address has changed since your last access. It may have been moved or deleted. Go back to the homepage and find the page you want to access. Often, you\u2019ll find the correct link this way.&nbsp;&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-check-your-login-credentials\">2. Check your login credentials<\/h3>\n\n\n\n<p>Another key thing to check is your login details. Attempting to access a website with an incorrect username or password can cause a page to display this error. Ensure you have valid authentication credentials and that the username and password are correctly used.<\/p>\n\n\n\n<p>If you forgot the password, you can attempt to reset or recover it.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-clear-and-reload-the-browser-cache-and-cookies\">3. Clear and reload the browser cache and cookies<\/h3>\n\n\n\n<p>As discussed above, most modern browsers store your authentication status in cookies and the website&#8217;s cache. That way, you can always pick up from where you left off.<\/p>\n\n\n\n<p>The cache also helps speed up browsing, as most page files are temporarily stored in your device&#8217;s memory to keep your logins active.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1915\" height=\"995\" src=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies.png\" alt=\"Clearing the cache and cookies in the Mozilla Firefox browser.\" class=\"wp-image-45243\" srcset=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies.png 1915w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies-300x156.png 300w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies-1024x532.png 1024w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies-768x399.png 768w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies-1536x798.png 1536w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies-24x12.png 24w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies-36x19.png 36w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/Clearing-the-cache-and-cookies-48x25.png 48w\" sizes=\"100vw\" \/><\/figure>\n\n\n\n<p>Attempting to access a web app with expired cookies often throws error 401.&nbsp;&nbsp;<\/p>\n\n\n\n<p>An easy fix for this is to clear all website cookies for the problem website and refresh the page. You can also clear browsing data and reload the page. This may mean logging in to a new session.&nbsp;&nbsp;<\/p>\n\n\n\n<p>You can also <a href=\"https:\/\/www.bluehost.com\/blog\/how-to-clear-your-wordpress-cache-and-why-you-should\/\">clear the cache<\/a>, which deletes all cache files and makes room for new files and logins. That often gets rid of any 401 unauthorized access errors.&nbsp;<\/p>\n\n\n\n<p>The process for clearing cookies differs depending on your browser.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-check-for-dns-changes\">4. Check for DNS changes<\/h3>\n\n\n\n<p>Although rarer than other problems, changes to your domain name server (DNS) may cause 401 errors. <a href=\"https:\/\/www.bluehost.com\/blog\/what-is-dns-domain-name-system\/\">DNS records<\/a> are usually on your device to help it match URLs to their IP addresses.&nbsp;<\/p>\n\n\n\n<p>If your DNS cache is outdated or expired, you may need to flush it to remove incorrect URLs and IP addresses.<\/p>\n\n\n\n<p>You can flush the DNS cache using the command line and force your device to refresh and authenticate the URLs.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"979\" height=\"218\" src=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/flush-DNS-cache.jpg\" alt=\"Flushing the DNS cache in Windows.\" class=\"wp-image-45238\" srcset=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/flush-DNS-cache.jpg 979w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/flush-DNS-cache-300x67.jpg 300w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/flush-DNS-cache-768x171.jpg 768w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/flush-DNS-cache-24x5.jpg 24w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/flush-DNS-cache-36x8.jpg 36w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/flush-DNS-cache-48x11.jpg 48w\" sizes=\"100vw\" \/><\/figure>\n\n\n\n<p>From your Windows command prompt, run the command <strong>ipconfig\/flushdns<\/strong><strong>. <\/strong>Windows will display a message confirming that the DNS cache has been flushed.&nbsp;<\/p>\n\n\n\n<p>On a Mac, run the command <strong>sudo killall -HUP mDNSResponder<\/strong>.<\/p>\n\n\n\n<p>Using <a href=\"https:\/\/www.bluehost.com\/domains\">Bluehost Domain Services<\/a>, you can manage your <a href=\"https:\/\/www.bluehost.com\/help\/article\/dns-records-explained\">DNS records<\/a> efficiently and ensure they are correctly configured to prevent unexpected authentication failures. If your DNS settings change frequently, Bluehost allows for easy domain management to avoid login issues.<\/p>\n\n\n\n<svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" viewBox=\"0 0 1000 300\"> \n\n  <image width=\"1000\" height=\"300\" xlink:href=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2025\/03\/Domains-1-3.png\"><\/image> <a xlink:href=\"https:\/\/www.bluehost.com\/domains\"> \n\n    <rect x=\"83\" y=\"203\" fill=\"#fff\" opacity=\"0\" width=\"168\" height=\"63\"><\/rect> \n\n  <\/a> \n\n<\/svg>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-deactivate-themes-and-plugins\">5. Deactivate themes and plugins<\/h3>\n\n\n\n<p>Installing a new theme or plugin can change the way your website behaves. It can affect the performance of your website and, in some cases, change the PHP, <a href=\"https:\/\/www.bluehost.com\/blog\/what-is-javascript\/\">JavaScript<\/a> or database code.&nbsp;<\/p>\n\n\n\n<p>If you experience 401 codes on one or multiple pages after installing a new plugin or theme, try deactivating it to see if it resolves the issue. If not, you may have to <a href=\"https:\/\/www.bluehost.com\/blog\/guide-to-plugin-installation-uninstallation-activation-and-deactivation\/\">deactivate and reactivate all your plugins<\/a> until you find the culprit.&nbsp;<\/p>\n\n\n\n<p>Rolling back updates also can resolve issues caused by unstable code and eliminate 401 error pages.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-6-disable-passwords-on-pages\">6. Disable passwords on pages<\/h3>\n\n\n\n<p>Disabling password protection for some pages on your website can sometimes resolve this error code. You can edit your .htaccess and .htpasswd files, but only if you have intermediate or advanced experience dealing with WordPress files.<\/p>\n\n\n\n<p>To disable password protection:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Log in to your hosting provider&#8217;s control panel and access the file manager.<\/li>\n\n\n\n<li>Find and open the password-protected directory.<\/li>\n\n\n\n<li>When enabling password protection, your WordPress website generates a .htaccess file. You may find it in this directory.&nbsp;<\/li>\n\n\n\n<li>Create a backup for the file, as you may need it in the future.<\/li>\n\n\n\n<li>Once done, delete the .htaccess file from the directory.&nbsp;<\/li>\n\n\n\n<li>Find the hidden <a href=\"https:\/\/httpd.apache.org\/docs\/2.4\/programs\/htpasswd.html\" target=\"_blank\" rel=\"noreferrer noopener\">.htpasswd<\/a> file, create a backup and delete it.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-7-check-the-www-authenticate-header-response\">7. Check the WWW-Authenticate header response<\/h3>\n\n\n\n<p>If none of these troubleshooting tips worked, it might be a deeper server-side issue.&nbsp;<\/p>\n\n\n\n<p>Your next step is to check your website\u2019s WWW-Authenticate header. This will require administrator access.<\/p>\n\n\n\n<p>When a server generates a 401 response, it sends a WWW-Authenticate header field with at least one challenge to the target resource. This header often has a fixed authentication method a browser must pass to access the chosen page.&nbsp;<\/p>\n\n\n\n<p>By understanding the response and the required authentication method, you can identify and fix the problem.<\/p>\n\n\n\n<p>To access the WWW-Authenticate header:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open the problematic page in your browser. If you\u2019re using Google Chrome, right-click the page and select <strong>inspect. <\/strong>Click <strong>Shift + Control + C<\/strong> to open the browser console on Firefox.<\/li>\n\n\n\n<li>Select the entry with the 401 error message under the <strong>network <\/strong>tab.<\/li>\n\n\n\n<li>Click the <strong>headers<\/strong><strong> <\/strong>tab. Under the WWW-Authenticate entry in the <strong>response <\/strong><strong>headers<\/strong><strong> <\/strong>section, find the server&#8217;s authentication method that allows access to the webpage.&nbsp;&nbsp;<\/li>\n<\/ol>\n\n\n\n<p>Once you access this section, you can tell where the error is and see how to resolve its authentication problem.<\/p>\n\n\n\n<p>For advanced troubleshooting of authentication issues, hosting on <a href=\"https:\/\/www.bluehost.com\/hosting\/vps\">Bluehost VPS Hosting<\/a> or<a href=\"https:\/\/www.bluehost.com\/hosting\/dedicated\"> Bluehost Dedicated Hosting<\/a> allows greater control over server settings, ensuring proper authentication headers are implemented. If you prefer scalable solutions, <a href=\"https:\/\/www.bluehost.com\/hosting\/cloud\">Bluehost Agency Hosting<\/a> optimizes authentication management, reducing access errors.\u00a0<\/p>\n\n\n\n<svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" viewBox=\"0 0 1001 300\"> \n\n  <image width=\"1001\" height=\"300\" xlink:href=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2025\/03\/Hosting-2.png\"><\/image> <a xlink:href=\"https:\/\/www.bluehost.com\/hosting\/shared\"> \n\n    <rect x=\"84\" y=\"180\" fill=\"#fff\" opacity=\"0\" width=\"187\" height=\"63\"><\/rect> \n\n  <\/a> \n\n<\/svg>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-8-refresh-expired-tokens-nbsp\">8. Refresh expired tokens&nbsp;<\/h3>\n\n\n\n<p>Some websites and apps use token-based authentication (like OAuth). If a token has expired or become invalid, you\u2019ll likely see a 401 error. To resolve this, try logging out and back in or reauthenticating with a new token. In apps using APIs, you may need to generate and replace the old token manually or programmatically.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-9-verify-api-authentication-credentials-nbsp\">9. Verify API authentication credentials&nbsp;<\/h3>\n\n\n\n<p>If you\u2019re using an API, double-check that your authentication credentials (such as an API key, access token or bearer token) are still valid. A typo or expired token could trigger the 401 response. Make sure you&#8217;re using the correct method of authentication required by the API documentation.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-10-check-permissions-and-access-rights-nbsp\">10. Check permissions and access rights&nbsp;<\/h3>\n\n\n\n<p>Incorrect file or user permissions on the server can result in 401 errors, especially for private pages, folders or resources. Ensure the authenticated user or role has the correct access level. If you&#8217;re running a multi-user platform, confirm that user roles and privileges are configured properly.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-11-debug-oauth-or-sso-issues-nbsp\">11. Debug OAuth or SSO issues&nbsp;<\/h3>\n\n\n\n<p>OAuth or Single Sign-On (SSO) systems may fail due to misconfigurations in redirect URIs, client IDs or scopes. This typically happens after changes to the authentication flow or third-party integrations. Double-check the settings in your identity provider or app dashboard to ensure everything is correctly set up.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-12-inspect-server-logs-nbsp\">12. Inspect server logs&nbsp;<\/h3>\n\n\n\n<p>For a more detailed look at what\u2019s causing the 401 error, examine your server logs. They often reveal missing credentials, incorrect endpoints or unauthorized access attempts. This step requires server access and is best done if you\u2019re comfortable with backend systems or with the help of your hosting provider.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-13-reconfigure-the-authentication-server-nbsp\">13. Reconfigure the authentication server&nbsp;<\/h3>\n\n\n\n<p>In cases where authentication is handled by a dedicated server (such as in enterprise environments), misconfigurations or downtime can result in 401 errors. You may need to restart the server, fix firewall rules or review authentication protocols to restore proper access.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-14-contact-your-host\">14. Contact your host<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help.png\" alt=\"If all else fails, you can contact your web host for help with your error.\" class=\"wp-image-45239\" srcset=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help.png 1920w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help-300x169.png 300w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help-1024x576.png 1024w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help-768x432.png 768w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help-1536x864.png 1536w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help-24x14.png 24w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help-36x20.png 36w, https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/contact-for-401-error-help-48x27.png 48w\" sizes=\"100vw\" \/><\/figure>\n\n\n\n<p>If you\u2019ve tried everything to no avail, you can contact your <a href=\"https:\/\/www.bluehost.com\/hosting\">hosting provider<\/a> for help. Your host\u2019s tech support team can explore your website and help you troubleshoot 401 and other HTTP errors.<\/p>\n\n\n\n<p>If you&#8217;re using Bluehost, our expert support team is available 24\/7. We can assist you with diagnosing server issues, reviewing authentication settings and restoring site access quickly and securely.&nbsp;<\/p>\n\n\n\n<svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" viewBox=\"0 0 1000 300\"> \n\n  <image width=\"1000\" height=\"300\" xlink:href=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2025\/03\/WordPress-Support.jpg\"><\/image> <a xlink:href=\"https:\/\/www.bluehost.com\/pro-design-live\"> \n\n    <rect x=\"81\" y=\"183\" fill=\"#fff\" opacity=\"0\" width=\"138\" height=\"54\"><\/rect> \n\n  <\/a> \n\n<\/svg>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-prevent-future-401-error-codes-on-your-website\">How to prevent future 401 error codes on your website?<\/h2>\n\n\n\n<p>Sometimes http 401 responses appear not because of server misconfiguration but due to simple browser issues like expired cookies or outdated cache.<\/p>\n\n\n\n<p>Avoiding errors is much better than dealing with them. So, how do you avoid 401 and other HTTP error codes on your website?&nbsp;<\/p>\n\n\n\n<p>Here are some quick tips:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keep your browser updated, which ensures you access websites from an efficient and powerful browser.<\/li>\n\n\n\n<li>Ensure your server configuration and its functionality are sound. That prevents server errors that may prevent correct page authentication.<\/li>\n\n\n\n<li>Double-check URLs and login credentials before accessing a password-protected website.<\/li>\n\n\n\n<li>Clear cookies and your browser cache frequently. Although you may have to log in to websites more often, this prevents potential 401 errors.<\/li>\n\n\n\n<li>Ensure your <a href=\"http:\/\/wordpress.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">WordPress software<\/a>, themes and plugins are up to date. Using old themes and plugins exposes your website to errors and other vulnerabilities.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p>Using <a href=\"https:\/\/www.bluehost.com\/wordpress\/wordpress-hosting\">Bluehost WordPress Hosting<\/a>, you can keep your website updated automatically, reducing security risks that can lead to authentication errors like the 401 response. <\/p>\n\n\n\n<p>For enhanced security, <a href=\"https:\/\/www.bluehost.com\/blog\/protect-your-website-with-sitelock\/\">SiteLock<\/a> provides automated malware scans, helping prevent unauthorized access and login issues. Additionally, if your 401 error code stem from email authentication issues, <a href=\"https:\/\/www.bluehost.com\/help\/article\/professional-email\">Bluehost Professional Email<\/a> ensures smooth, secure access to your website-related email services.&nbsp;<\/p>\n\n\n\n<svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" viewBox=\"0 0 1001 300\"> \n\n  <image width=\"1001\" height=\"300\" xlink:href=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2025\/03\/WordPress-Hosting-10.jpg\"><\/image> <a xlink:href=\"https:\/\/www.bluehost.com\/wordpress\/wordpress-hosting\"> \n\n    <rect x=\"83\" y=\"203\" fill=\"#fff\" opacity=\"0\" width=\"130\" height=\"63\"><\/rect> \n\n  <\/a> \n\n<\/svg>\n\n\n\n<h2 class=\"wp-block-heading\">Common mistakes when fixing error 401<\/h2>\n\n\n\n<p>When troubleshooting a 401 Unauthorized Error, it&#8217;s easy to overlook certain details that can lead to prolonged issues. Here are some common mistakes to avoid, along with their solutions:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Using an incorrect URL format<\/h3>\n\n\n\n<p>A simple typo in the URL can trigger the error. Entering an outdated or incorrect URL may result in authentication failure or restricted access to the requested page.<br><strong>Solution:<\/strong> Double-check the URL to ensure it is correctly spelled, starts with https:\/\/, and doesn\u2019t contain unnecessary slashes or characters. If the page has moved or been deleted, navigate to the homepage or <a href=\"https:\/\/www.bluehost.com\/blog\/how-to-create-a-sitemap\/\">sitemap<\/a> to find the correct link.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-forgetting-to-clear-browser-cache-amp-cookies\">2. Forgetting to clear browser cache &amp; cookies<\/h3>\n\n\n\n<p>Expired authentication tokens stored in cookies can persist the error 401, even after the issue is fixed. If an old session is stored in your browser cache, the authentication process may fail repeatedly.<\/p>\n\n\n\n<p><br><strong>Solution:<\/strong> Clear your browser cache and cookies from the settings menu, then restart your browser before reattempting access. This will remove outdated session data and allow for a fresh authentication attempt.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-not-checking-login-credentials-properly\">3. Not checking login credentials properly<\/h3>\n\n\n\n<p>Users often assume they are entering the correct username and password but may unknowingly use outdated or incorrect credentials. Repeated failed attempts can also lead to temporary account locks and 401 status code.<\/p>\n\n\n\n<p><br><strong>Solution:<\/strong> Ensure you are using the most up-to-date login credentials. If you\u2019re unsure, reset your password using the website\u2019s recovery options. Also, check if Caps Lock or Num Lock is accidentally enabled while entering your details.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-ignoring-security-plugins-amp-firewalls\">4. Ignoring security plugins &amp; firewalls<\/h3>\n\n\n\n<p>Some security plugins or firewalls may block legitimate login attempts, mistaking them for unauthorized access attempts. This can happen if security settings are too restrictive or if an IP address has been mistakenly blacklisted.<\/p>\n\n\n\n<p><br><strong>Solution:<\/strong> Temporarily disable security plugins like <a href=\"https:\/\/www.bluehost.com\/blog\/wordfence-increases-security-on-your-wordpress-site\/\">Wordfence<\/a> or SiteLock and try logging in again. If access is restored, adjust the plugin settings to prevent false positives while maintaining security.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-the-difference-between-error-401-and-403-errors\">What is the difference between error 401 and 403 errors?<\/h2>\n\n\n\n<p>Error 401 (Unauthorized) occurs when authentication is required but missing or invalid\u2014like incorrect login details or expired tokens. In contrast, error 403 (Forbidden) means access is denied even with valid credentials, usually due to permission settings or security rules. To fix 401, check your login or API credentials; for 403, adjust file permissions or server configurations.&nbsp;<\/p>\n\n\n\n<p>Read more: <a href=\"https:\/\/www.bluehost.com\/blog\/fix-403-forbidden-error-wordpress\/\">How to Fix the 403 Forbidden Error in WordPress<\/a>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-variations-of-401-authentication-error-nbsp\">Variations of 401 authentication error&nbsp;<\/h2>\n\n\n\n<p>The 401 error code can appear in several forms depending on the platform or server. Here are common variations of the HTTP error 401:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>401 unauthorized<\/strong>: Trigger when authentication credentials are missing or invalid&nbsp;<\/li>\n\n\n\n<li><strong>HTTP error 401 \u2013 unauthorized access<\/strong>: Appear when users try to access restricted content without proper login&nbsp;<\/li>\n\n\n\n<li><strong>401 authorization required<\/strong>: Signal that the server expects valid authentication details before granting access&nbsp;<\/li>\n\n\n\n<li><strong>401 \u2013 access is denied due to invalid credentials<\/strong>: Display after failed login attempts or expired tokens&nbsp;<\/li>\n\n\n\n<li><strong>401 error code from API or app<\/strong>: Indicate issues like invalid API keys or missing authentication headers&nbsp;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-final-thoughts-nbsp\">Final thoughts&nbsp;<\/h2>\n\n\n\n<p>Error 401 response code can be frustrating, but with proper website maintenance, you can prevent and resolve these issues efficiently. Choosing a reliable hosting provider ensures your website remains updated, secure and optimized for smooth authentication processes. With Bluehost WordPress Hosting, automatic updates help reduce vulnerabilities, while SiteLock and CodeGuard provide enhanced security monitoring and backups to prevent login issues.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Looking for a secure and hassle-free hosting experience? Check out <a href=\"https:\/\/www.bluehost.com\/wordpress\/wordpress-hosting\">Bluehost\u2019s WordPress hosting plans<\/a>&nbsp;and take advantage of automatic core WordPress updates that help keep your website secure and error-free.&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faqs\">FAQs<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1689359803164\"><strong class=\"schema-faq-question\"><strong>What is 401 error code and why does it appear as an http error?<\/strong><\/strong> <p class=\"schema-faq-answer\">The 401 status code is an http status code that indicates the request could not be completed because authentication is missing or invalid. It usually means the server did not receive proper credentials.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1689359816586\"><strong class=\"schema-faq-question\"><strong>What does 401 authorization required meaning imply in simple terms?<\/strong><\/strong> <p class=\"schema-faq-answer\">It means the server is demanding valid authentication details before allowing access to the requested web page. In other words, the 401 status code is telling you that login details or credentials are either missing or incorrect.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757585509819\"><strong class=\"schema-faq-question\"><strong>Why am I getting a 401 unauthorized error while signing in?<\/strong><\/strong> <p class=\"schema-faq-answer\">A 401 unauthorized error often happens when login credentials, tokens or sessions are invalid. It can also occur if you try to access a restricted web page with insufficient permissions.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757585520192\"><strong class=\"schema-faq-question\"><strong>Can http 401 error be related to an api key issue?<\/strong><\/strong> <p class=\"schema-faq-answer\">Yes. An api key that is missing, expired or incorrectly set in the header response can cause an http 401 error. This happens often with APIs that require secure identification before granting data access.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757585538358\"><strong class=\"schema-faq-question\"><strong>Why does my browser\u2019s cookies sometimes trigger an error code 401?<\/strong><\/strong> <p class=\"schema-faq-answer\">If your browser\u2019s cookies are corrupted or not properly updated, the server may reject your session and return error code 401. Clearing cookies and the outdated browser cache often fixes this problem.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757585549838\"><strong class=\"schema-faq-question\"><strong>How does google chrome show http 401 messages differently from other browsers?<\/strong><\/strong> <p class=\"schema-faq-answer\">On google chrome, an http 401 message may appear as a blank page or direct notification saying &#8220;401 authorization required.&#8221; Other browsers might phrase it slightly differently, but the underlying http status code remains the same.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757585559701\"><strong class=\"schema-faq-question\"><strong>Is http 401 different from 401 unauthorized?<\/strong><\/strong> <p class=\"schema-faq-answer\">No, http 401 and 401 unauthorized are the same thing. Both indicate that the server refuses to provide the requested resource until you re authenticate with valid credentials.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757585582423\"><strong class=\"schema-faq-question\"><strong>What steps can fix trouble accessing websites due to a 401 unauthorized error?<\/strong><\/strong> <p class=\"schema-faq-answer\">You can try checking credentials, refreshing the access token, clearing browser\u2019s cookies, updating login details or verifying that you have sufficient permissions. If these steps don\u2019t help, contact the site administrator for further support.<\/p> <\/div> <\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to fix HTTP 401 errors in WordPress. From expired credentials to plugin conflicts, follow our complete 2025 guide to resolve and prevent unauthorized access.<\/p>\n","protected":false},"author":152,"featured_media":45265,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_title":"What is a 401 Error? How to Troubleshoot, Fix and Prevent it","_yoast_wpseo_metadesc":"Experiencing 401 errors on your WordPress website? Read this tutorial to learn how to identify the causes and 8 ways to troubleshoot 401 errors.","inline_featured_image":false,"footnotes":""},"categories":[14],"tags":[3319,3327,3330,3343],"ppma_author":[948],"class_list":["post-45233","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-compliance","tag-faqs","tag-how-to-guides","tag-tutorials"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What is a 401 Error? How to Troubleshoot, Fix and Prevent it<\/title>\n<meta name=\"description\" content=\"Experiencing 401 errors on your WordPress website? 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Read this tutorial to learn how to identify the causes and 8 ways to troubleshoot 401 errors.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.bluehost.com\/blog\/401-error\/\" \/>\n<meta property=\"og:site_name\" content=\"Bluehost Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/bluehost\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-09T10:49:48+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-10T05:13:15+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.bluehost.com\/blog\/wp-content\/uploads\/2023\/06\/what-is-a-401-error.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Charrvi Singh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@bluehost\" \/>\n<meta name=\"twitter:site\" content=\"@bluehost\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Charrvi Singh\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"17 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\/\/www.bluehost.com\/blog\/401-error\/\",\"url\":\"https:\/\/www.bluehost.com\/blog\/401-error\/\",\"name\":\"What is a 401 Error? 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