In Windows Event Viewer the following errors are browsed every 10 minutes:
Failed to connect to database: Can't connect to MySQL server on 'localhost' (10061) at (MySQLDatabaseProvider::connect line 199) at Unable to get admin e-mail(runtask::start line 115)
This is a Plesk Mobile scheduler task. The reported problem in Event Viewer refers to MySQL authorization. The process cannot get the access to database due to incorrect password saved in Plesk database.
To resolve the issue reregister MySQL database server using KB 213947045
To disable Plesk Mobile notifications you can use KB 213933145