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 @ 06:41
Script: /wbb/usercp.php?action=buddy&add=1090569945&sid=e46ba35895e4b0e97e2aa726c8a260ec
Referer: http://delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=1090569945&sid=e46ba35895e4b0e97e2aa726c8a260ec