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 @ 08:22
Script: /wbb/usercp.php?action=buddy&add=175&sid=0a95d0f81e5f7fcd00aa6d3a82d66df3
Referer: http://www.delftseschaaksite.nl/wbb/usercp.php?action=buddy&add=175&sid=0a95d0f81e5f7fcd00aa6d3a82d66df3