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: 05.05.2024 @ 16:33
Script: /misc.php?action=faq&sid=d04c8550a09f8c8b66c4ccbc43b9caf6
Referer: http://stc-board.de/misc.php?action=faq&sid=d04c8550a09f8c8b66c4ccbc43b9caf6