SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Can't connect to local MySQL server through socket '/srv/.mysql/mysql.sock' (111)
mysql error number: 2002
mysql version: unknown
php version: 5.6.19
Date: 10.05.2024 @ 09:25
Script: /calendar.php?action=addevent&type=private&sid=37b34a7ada29e98123912aa35cb181cd
Referer: