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 @ 00:42
Script: /wbb/index.php?sid=5d4f75dadc7090abd5c541c4c6f892d4
Referer: http://www.delftseschaaksite.nl/wbb/index.php?sid=5d4f75dadc7090abd5c541c4c6f892d4