How to Fix 405 Method Not Allowed Error in WordPress

The “405 Method Not Allowed” error in WordPress is a frustrating obstacle that can prevent your web pages from functioning correctly. It usually occurs when your web server rejects a request method for a specific web page or resource.

Fortunately, this issue can be resolved with a structured troubleshooting process. This guide will teach you how to fix WordPress’s 405 Method Not Allowed error using beginner-friendly and advanced techniques.

What is the 405 Method Not Allowed Error in WordPress?

The 405 Method Not Allowed error is an HTTP status code indicating that the server understands the request method but refuses to fulfill it. In a WordPress site, the server acknowledges the HTTP method (like GET or POST) but blocks its execution for the requested resource. This results in an error message instead of the expected server response.

This HTTP error usually appears after changes in server configuration, plugin installations, theme updates, or incorrect rewrite rules in the .htaccess file. Because nearly every web application uses HTTP methods to create or retrieve content, understanding this error is essential for proper maintenance and uptime.

Common Causes of the 405 Method Not Allowed Error

The 405 error is often triggered when the server does not accept the method used in an HTTP request. To resolve it effectively, it is essential to understand the root causes contributing to this WordPress error on your WordPress site.

Misused or Unsupported HTTP Methods

Most web servers accept specific HTTP methods, such as GET and POST, by default. However, particular HTTP methods like PUT, DELETE, or PATCH may be blocked if not configured correctly in the server settings or web server software. This mismatch between server expectations and actual different HTTP methods leads to a process not allowed error.

Mistyped or Incorrect URL Paths

A common mistake that causes the 405 error is entering an incorrect URL in the browser address bar. If you try to access a wrong URL that does not support the request method, the server rejects it, resulting in an error message. Always double-check the requested resource and the URL format.

Plugin or Theme Conflicts

• WordPress plugins that alter how HTTP requests are sent or handled can introduce unexpected behavior.

• Custom code or outdated themes might send HTTP requests using specific HTTP methods not allowed by the server.

These conflicts often result in a method that does not allow errors across different web pages or functions.

Improper Server Configuration or Firewall Rules

Incorrect server configuration in files like the .htaccess or other config files can prevent specific HTTP methods from functioning correctly. In some cases, firewalls or security plugins block suspicious requests, which can trigger the 405 method not allowed response seen in server logs.

Corrupt .htaccess File or Rewrite Rules

The .htaccess file in the root directory helps manage how WordPress handles permalinks and redirects. Improper rewrite rules, especially those involving denied HTTP methods or malformed directives, can prevent access to specific web pages and cause this error code.

Incorrect File and Directory Permissions

• File permissions that are too strict can block the server from executing allowed methods.
• Typically, WordPress directories should be set to 755 and files to 644.
• Any deviation may restrict access and lead to an error in the method, which is not allowed.

Hosting Provider Limitations

Some hosting providers enforce strict server rules that disable specific HTTP methods, such as PUT or DELETE, for security purposes. These limitations, if undocumented or misunderstood, can complicate the troubleshooting process. Check with your hosting provider to verify allowed error types and supported HTTP methods on their infrastructure.

Related: How to Fix Database Errors in WordPress

How to Start Troubleshooting the 405 Error in WordPress

Start with basic diagnostics before diving into complex server configurations. Identifying the exact point of failure early can save significant time and prevent unnecessary disruptions.

• Double-Check the URL: Start by confirming that the URL in your browser’s address bar is correct. A typo or an incorrect file extension can cause a 405 Method Not Allowed error. Ensure the requested resource exists and supports the method being used.

• Review Recent Site Changes: Have you recently added new plugins or themes, or updated the WordPress installation? If the error appeared shortly after these changes, it is likely related to them. Document and isolate each change to help identify the source.

• Use an FTP Client to Verify File Presence: Using an FTP client, inspect your website’s file system to confirm that files related to the specific web page throwing the error exist. Missing or misplaced files can cause the server to reject specific HTTP requests.

Also Read: How to Fix 404 Not Found Error in WordPress

Diagnosing and Debugging the Error

After basic checks, move on to a more technical investigation to understand what is causing the server to reject specific HTTP methods by enabling debug mode. This step focuses on examining logs, debugging tools, and configuration files to pinpoint the exact source of the 405 error.

Enable WordPress Debug Mode

To gather more details, enable debug mode in your wp-config.php file. Add the following lines:

define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);

This configuration logs error messages to a debug.log file in the wp-content directory, helping you trace the source of the problem.

Use Browser Developer Tools

Open browser developer tools and inspect the Network tab. Look for the HTTP request associated with the error. Check the request method, headers, and server responses to identify mismatches.

Review Server Logs

Access logs and error logs contain detailed entries for each HTTP request. Review these log files to determine which method was used and why the server rejected it.

Inspect Server Configuration Files

For Apache servers, open the htaccess file in your application root directory. For NGINX, review the main config file. Look for directives that limit HTTP methods or enforce redirects that might be invalid.

Fixing File Permissions and Application-Level Issues

Issues at the file system or application level can silently interfere with server operations and cause HTTP request failures. Addressing these problems is key to restoring everyday communication between your WordPress site and the web server.

Verify File and Directory Permissions

Incorrect file permissions can result in denied access. WordPress directories typically have 755 permissions to avoid incorrect file permissions, and files should have 644. Use your FTP client or hosting control panel to modify these settings.

Check Application Code for Errors

If you use custom code or plugins that send HTTP requests, make sure they use allowed methods. Errors in request method definitions can cause 405 errors.

Remove Leftover Database Tables and Files

Sometimes, uninstalling a plugin leaves residual database tables or files behind, which can interfere with HTTP processing. Clean your database and file system for better stability.

Use Debugging Plugins

Plugins designed to scan your WordPress configuration and detect conflicts or misconfigurations exist. These tools can highlight settings that trigger the method not allowed error.

Deactivating Plugins and Themes to Identify Conflicts

File and permission errors often operate behind the scenes and can be challenging to identify without direct access to server files or the database. Addressing these issues can restore proper server responses and eliminate method-not-allowed errors.

• Deactivate All Plugins Temporarily: Navigate to your WordPress dashboard or use FTP to rename the plugins folder. This deactivates all plugins. If the error disappears, one of the plugins is the culprit.

• Reactivate Plugins One by One: Enable plugins one at a time and reload the affected web page. When the error returns, you will know which plugin is causing it.

• Switch to a Default Theme: Temporarily activate a default theme like Twenty Twenty-Five. This helps determine if your current theme or custom functions are triggering the error.

Clearing Caches to Ensure Accurate Testing

Caching mechanisms sometimes serve outdated content or scripts, contributing to HTTP errors. To properly troubleshoot the 405 Method Not Allowed error in WordPress, you must eliminate these cached elements for accurate results.

• Clear Browser Cache: Clear your browser cache and disable browser extensions that could interfere with HTTP requests. This ensures you are loading the most current version of your site.

• Clear WordPress and Server Caches: Flush caches from any caching plugins like W3 Total Cache or WP Super Cache. Also, purge server-side or CDN caches if applicable.

Rolling Back Recent Changes

Rolling back recent changes can quickly and effectively resolve the 405 Method Not Allowed error. If you suspect a recent update triggered the issue, restoring a previous state of your WordPress site can help eliminate the problem.

• Restore a Previous Version of Your Site: If you have a backup created before the error appeared, consider restoring it. This is the quickest way to undo any changes that caused the problem.

• Use Rollback Tools for Plugins and Themes: Several WordPress plugins allow you to roll back to a previous plugin or theme version. Use these if an update is suspected to be the source of the issue.

Advanced Server-Side Fixes for 405 Errors

If the basic troubleshooting steps have not resolved the issue, it is time to explore more technical server-side solutions. These methods focus on fine-tuning your server configuration and identifying deeper conflicts that may be blocking specific HTTP methods or interfering with the request method used by your WordPress site.

Issues at this level often relate to server files, firewall settings, or the web server software itself. These fixes require caution, especially when modifying core configuration files or settings related to server expectations.

Adjust .htaccess Rules

• In your .htaccess file, remove or comment out any lines restricting specific HTTP methods such as PUT, DELETE, or PATCH.

• Regenerate a fresh htaccess file by going to Settings → Permalinks in your WordPress dashboard and clicking Save Changes. This ensures correct rewrite rules and resolves method-not-allowed errors related to redirects.

Modify Web Server Configurations

• Access your web server configuration files (e.g., httpd.conf for Apache or nginx.conf for NGINX) and check whether your server rejects specific HTTP methods.

• Make sure the necessary request methods are explicitly allowed. This may involve editing or removing restrictive directives.

• Always back up configuration files before making any changes.

Review Firewall Rules

• Web application firewalls like mod_security can block legitimate HTTP requests, triggering a 405 Method Not Allowed error.

• Review and modify firewall rules to ensure they do not mistakenly block the methods allowed in your WordPress installation.

Contact Your Hosting Provider

• If you lack access to advanced server settings, contact your hosting provider.

• They can review server, configuration, and access logs to determine why the error code appears.

• Some hosting providers place restrictions on specific HTTP methods by default for security.

Scan for Malware

• Malware or malicious code in your application or plugins can interfere with HTTP requests or modify server responses.

• Use a trusted security plugin to scan your entire WordPress site, including the root directory and database, for unexpected changes or leftover database tables.

Test on a Staging Site

• Create a staging environment to replicate the issue without risking your live site.

• This controlled setup allows you to adjust server settings, experiment with theme plugins, and safely identify the root cause of the HTTP error.

These advanced server-side solutions address hidden conflicts and fine-grained server settings that are not always visible through the WordPress dashboard. Taking these steps can help you eliminate persistent 405 errors and restore full functionality to your site.

Know More: WordPress Emergency Support: What to Do When Your Site Crashes

Preventing the 405 Method Not Allowed Error in the Future

Avoiding the 405 Method Not Allowed error begins with proactive site management and server awareness. Implementing preventative best practices helps reduce the likelihood of reencountering this issue.

Keep Everything Updated

Regularly update your WordPress installation, themes, and plugins to ensure modern web server software compatibility.

Use High-Quality Plugins and Themes

Choose plugins and themes that are well-maintained and widely used. Avoid outdated or poorly supported options.

Maintain Proper File Permissions

Ensure all files and directories have the correct permissions to prevent server rejections.

Configure Server Rules Carefully

Avoid overly restrictive rewrite rules or method-blocking directives unless necessary. Document any changes made to configuration files.

Monitor Your Site’s Health

Use uptime monitoring and security tools to receive alerts about server-side issues and unexpected errors.

Schedule Regular Backups

Back up your site frequently to restore it quickly if an error occurs. Use automated backup plugins or services from your hosting provider.

Final Thoughts

Fixing the 405 Method Not Allowed error in WordPress involves checking URLs, reviewing plugins, adjusting server configurations, and examining server logs. By following this comprehensive troubleshooting process, you can identify the cause and resolve the issue without risking site functionality.

Always back up your WordPress site before making significant changes. Regular maintenance, updates, and monitoring are essential to prevent future HTTP errors and ensure a seamless experience for your visitors.

If you have exhausted all options and the error persists with the method not allowed, contact your hosting provider or consult a WordPress developer to resolve deeper server issues.

FAQs About 405 Method Not Allowed Error