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 @ 07:17
Script: /wbb/usercp.php?action=buddy&add=41&sid=d7b2e86fc439c18b4803b2af71bd0251
Referer: http://delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=41&sid=d7b2e86fc439c18b4803b2af71bd0251