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: 04.07.2025 @ 05:02
Script: /usercp.php?action=buddy&add=637&sid=569bdc1931c156da77f0243f1e54accd
Referer: