If you see the message “There has been a critical error on this website” after installing or updating a plugin, it usually means that one of your plugins is causing a conflict or fatal error.
How to fix it
Access your website via FTP or File Manager in your hosting control panel.
Go to the folder:
/wp-content/plugins/Find the folder of the last installed or updated plugin.
Rename this folder (for example, add
_oldto its name) or delete it completely.
Once you do this, WordPress will automatically deactivate the plugin, and your site should start working again.
Tip
After regaining access, log in to your WordPress dashboard and check for plugin compatibility or PHP version issues before activating the plugin again.