Hi, Kokatnur!
It seems that your site cannot establish a database connection. This can be caused by incorrect database information in your WordPress settings, corrupt database, or an irresponsive database server.
1. Check your WordPress database credentials
You need to make sure that the information for the database name, username, password, and database host is correct in wp-config.php
. You can get this information from your WordPress hosting account dashboard.
2. If step #1 didn’t help, you also have to make sure that your database user has sufficient permission and your database host is up and running.
If everything else fails, then you may need to contact your web hosting company.
Is this a first WP installation error or did this happen after a while? Most probably your database credentials need to be updated.
Hope this helps,
Good luck!
Vlad