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 @ 07:09
Script: /wbb/login.php?sid=9c4cd14cf021d3a3489be7fba7d01c7d
Referer: http://www.delftseschaaksite.nl/wbb/login.php?sid=9c4cd14cf021d3a3489be7fba7d01c7d