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 @ 05:50
Script: /wbb/usercp.php?action=buddy&add=91&sid=98fffa504c2abbc460f3dd5a1d8796bf
Referer: http://delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=91&sid=98fffa504c2abbc460f3dd5a1d8796bf