Plesk 12.5.3 error

Hello all !
I have an error on my plesk server, that i can`t resolve it ! Hope someone from here can help me :) — Plesk version 12.5.30 under Virtuozzo

  • Error on Plesk login page : Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0 Fatal error: Unknown: Failed opening required 'auth.php' (include_path='.:') in Unknown on line 0

  • Error when i try to make changes from ssh : Warning:…

Plesk 12.5.3 error