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: 5.6.40-70+0~20240421.84+debian12~1.gbp0c0ec4
Date: 22.05.2025 @ 16:57
Script: /usercp.php?action=buddy&add=222&sid=68cf922129b198c4a56f40fd6eb4eac7
Referer: