This error may be displayed on your WordPress site when there is an issue connecting to the MySQL database on the server.
If your website has previously been working, it may be a temporary fault that is occuring on the server that you are on, it may be worthwhile to check the Network Status Page. Please try again in a few moments.
If the issue persists, please check the `wp-config.php` database variables to ensure they are correct, as well as the MySQL permissions for the database user you are using.
Otherwise, if you're still stuck please contact our support team who should be able to point you in the right direction.