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 @ 07:28
Script: /wbb/usercp.php?action=buddy&add=336&sid=0bb9a2180f2c1c156aa7867d6cac7209
Referer: http://www.delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=336&sid=0bb9a2180f2c1c156aa7867d6cac7209