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 '/var/run/mysqld/mysqld.sock' (2)
mysql error number: 2002
Date: 29.04.2025 @ 19:39
Script: /usercp.php?action=addsubscription&boardid=76&sid=ec691fd9cfd02227c5ff9cf87f04cb0c
Referer: