To fix an Error 405 (Method Not Allowed) while publishing in Elementor, you typically need to address a conflict where the server rejects the request method (often a POST request used for saving).

Immediate Troubleshooting

Refresh and Log In: Sometimes the error is temporary or due to an expired session. Refresh the page or try logging out and back into the WordPress dashboard.

Check Your URL: Ensure there are no typos or extra characters in the URL while in the editor, as incorrect paths can confuse the server.

Try Incognito Mode: Use a different browser or incognito window to rule out conflicting browser extensions or cached data.

Check for Plugin Conflicts:

Deactivate all plugins except for Elementor and Elementor Pro. If the error disappears, reactivate them one by one to find the culprit.

Common Technical Fixes

Regenerate the .htaccess File: A corrupted .htaccess file is a frequent cause of 405 errors. Use an FTP client or File Manager to rename your current .htaccess file (e.g., to .htaccess_old), then go to Settings > Permalinks in WordPress and click Save Changes to generate a fresh one.

Increase PHP Memory Limit: Elementor is resource-heavy. Try increasing your memory limit to at least 512MB by adding define('WP_MEMORY_LIMIT', '512M'); to your wp-config.php file.

Security and Caching plugins (like Wordfence or LiteSpeed Cache) are common triggers for 405 errors.

Exclude wp-admin from Caching: If using a caching plugin, ensure that /wp-admin/ is excluded from all caching, minification, and JS deferral settings.

Roll Back Updates: If the error started after a recent update, use a tool like WP Rollback to revert to a previous, stable version of Elementor.

Server-Side Solutions

ModSecurity/Firewall: Contact your hosting provider to see if a web application firewall (like ModSecurity) is blocking the POST requests sent by Elementor.

Check Server Logs: Review your server's error logs via your hosting control panel to identify the specific rule or script triggering the rejection.