This error comes from your .htaccess file. The .htaccess file is a hidden file, so you must set all files as visible in your FTP.
Category: WordPress Errors
50 Most Common WordPress Errors and How to Fix Them
You can’t update WordPress because of this issue. It should normally go away on its own. If it doesn’t, you’ll have to manually correct it.
There are a handful of reasons you might see this message on your WordPress site: Your PHP installation appears to be missing the MySQL extension
Fix WordPress Error Establishing a Database Connection – This error occurs when WordPress is unable to make a connection to the database. A number of