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 @ 03:13
Script: /wbb/usercp.php?action=buddy&add=1&sid=4e488119a5f0a18eb19fcca7f64d5cf3
Referer: http://www.delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=1&sid=4e488119a5f0a18eb19fcca7f64d5cf3