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 @ 01:03
Script: /wbb/usercp.php?action=buddy&add=44&sid=ab848f9f93fd065baafd62ad4b0d9c98
Referer: http://delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=44&sid=ab848f9f93fd065baafd62ad4b0d9c98