This article covers easy to follow methods to resolve WordPress 401 error.
The 401 error has multiple names including Error 401 and 401 unauthorized error.
These errors are sometimes accompanied by a message ‘Access is denied due to invalid credentials’ or ‘Authorization required’.
To fix the 401 error in WordPress:
1. Temporarily Remove Password Protection on WordPress Admin
2. Clear Firewall Cache to Solve 401 Error in WordPress
3. Deactivate All WordPress Plugins
4. Switch to a Default WordPress Theme
5. Reset WordPress Password