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: 10.05.2024 @ 11:11
Script: /misc.php?action=faq&sid=bcec511f5f0e3ec2f4eb1c6e71774f0a
Referer: http://stc-board.de/misc.php?action=faq&sid=bcec511f5f0e3ec2f4eb1c6e71774f0a