Symptoms
Plesk interface is not accessible with the following error:
500 PleskExceptionDatabase
DB query failed: SQLSTATE[42S22] Column not found: 1054 Unknown column 'd.monthlyTraffic' in 'field list'
Cause
The column monthlyTraffic is absent in the table domains of the Plesk configuration database psa.
Resolution
1. Connect to the server via SSH.
2. Execute the command below to re-create the correct table structure of the Plesk configuration database:
# plesk repair db