SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Connection refused
mysql error number: 2002
mysql version: unknown
php version: 5.6.40
Date: 28.03.2024 @ 20:13
Script: /usercp.php?action=buddy&add=34&sid=9e9791876dbc79b5e6c64475c413ef30
Referer: