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 @ 08:16
Script: /wbb/board.php?boardid=156&sid=8ae730a3b6654a41b6f4e53093d22f1a
Referer: http://www.delftseschaaksite.nl/wbb/board.php?boardid=156&sid=8ae730a3b6654a41b6f4e53093d22f1a