PleskFatalException (Plesk 9.x for Windows)

When you try to logon to plesk you’ll get an error:

ERROR: PleskFatalException
wrong id

0: UserClient.php:24
UserClient->__construct(NULL null)
1: class.Session.php:221
2: index.php:58

Even when you restart the services / server the error stays.

Solution: Open the psa database and clear the sessions table: “delete from sessions”