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 @ 05:43
Script: /wbb/usercp.php?action=buddy&add=1090569913&sid=956d22c41562cc2ff0bdc34ee25beb39
Referer: http://www.delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=1090569913&sid=956d22c41562cc2ff0bdc34ee25beb39