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 @ 00:40
Script: /wbb/board.php?boardid=20&sid=e4fdcd3a4a3932529f21b8a94df398aa
Referer: http://delftseschaaksite.nl/wbb/board.php?boardid=20&sid=e4fdcd3a4a3932529f21b8a94df398aa