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 '/tmp/mysql5.sock' (111)
mysql error number: 2002
mysql version: unknown
php version: 5.2.17
Date: 03.05.2024 @ 10:59
Script: /board/thread.php?threadid=966&page=2&sid=1bf1ffc9a65f4edc831cd54d46ba01e1
Referer: