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: 02.05.2024 @ 23:10
Script: /misc.php?action=faq&sid=e5551dc2dd6182f67e2cffa37f4331a5
Referer: http://stc-board.de/misc.php?action=faq&sid=e5551dc2dd6182f67e2cffa37f4331a5