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: 08.07.2025 @ 10:29
Script: /usercp.php?action=buddy&add=637&sid=a15c0da1edc765da6d98f0059a7f7e4b
Referer: