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 @ 00:55
Script: /wbb/search.php?action=user&userid=336&sid=0fe73406d0f52b08e4f27a6b7cc8ddb6
Referer: http://www.delftseschaaksite.nl/wbb/search.php?action=user&userid=336&sid=0fe73406d0f52b08e4f27a6b7cc8ddb6