Error occurred during script startup, usually a result of inability to connect to the database:

Error triggered: mysqli_connect(): (42000/1226): User 'diplomai_web' has exceeded the 'max_user_connections' resource (current value: 30).

This was probably caused by a software bug. If these occur often try enabling error-logging via config.php, and report errors to the official devs for help.

Could not successfully close connection to database.