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 @ 07:06
Script: /wbb/board.php?boardid=20&sid=4afd1c3df74fe5a3fe0edc625661f16f
Referer: http://delftseschaaksite.nl/wbb/board.php?boardid=20&sid=4afd1c3df74fe5a3fe0edc625661f16f