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: 21.01.2025 @ 23:36
Script: /board.php?boardid=9&sid=ec691fd9cfd02227c5ff9cf87f04cb0c
Referer: