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: 30.06.2025 @ 22:58
Script: /board.php?boardid=15&sid=642fe16c0a0cf20cff8953f0c7abcf60
Referer: