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: 21.05.2024 @ 00:57
Script: /wbb/board.php?boardid=142&sid=2993da67b28c0e4a1fb0125dd5461923
Referer: