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 @ 00:24
Script: /wbb/newthread.php?boardid=20&sid=f5ed2e5ea3f6e7fa636c7c354edaddb1
Referer: http://www.delftseschaaksite.nl/wbb/newthread.php?boardid=20&sid=f5ed2e5ea3f6e7fa636c7c354edaddb1