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 @ 00:57
Script: /wbb/search.php?action=user&userid=15&sid=7629b4fea44b3def948d3b13ef3a2ac4
Referer: http://www.delftseschaaksite.nl/wbb/search.php?action=user&userid=15&sid=7629b4fea44b3def948d3b13ef3a2ac4