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 @ 02:08
Script: /wbb/usercp.php?action=buddy&add=1090569945&sid=0f09cb7d02ba57bff0ecf6d3c17c5e71
Referer: http://www.delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=1090569945&sid=0f09cb7d02ba57bff0ecf6d3c17c5e71