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 @ 05:06
Script: /wbb/login.php?sid=e02c7d2fbc905f6e8fed57ecc3aba8ef
Referer: http://delftseschaaksite.nl/wbb/login.php?sid=e02c7d2fbc905f6e8fed57ecc3aba8ef