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: 5.6.40-57+0~20211119.60+debian9~1.gbp8a9bd1
Date: 30.04.2024 @ 23:47
Script: /misc.php?action=faq&sid=337b8ef8b7c2d031d0207659bcfd5c4b
Referer: http://stc-board.de/misc.php?action=faq&sid=337b8ef8b7c2d031d0207659bcfd5c4b