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' (2)
mysql error number: 2002
mysql version: unknown
php version: 5.2.17
Date: 02.05.2024 @ 19:56
Script: /board/thread.php?threadid=1039&sid=ce580cb78fccb103f015eb8a39c83d11
Referer: