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 @ 07:53
Script: /wbb/board.php?boardid=39&sid=ef4a21eebd5ba19fe60342b92f9cfd80&daysprune=1000&sortfield=lastposttime&sortorder=DESC&page=6
Referer: http://www.delftseschaaksite.nl/wbb/board.php?boardid=39&sid=ef4a21eebd5ba19fe60342b92f9cfd80&daysprune=1000&sortfield=lastposttime&sortorder=DESC&page=6