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: 12.05.2024 @ 02:02
Script: /misc.php?action=imprint&sid=c55b64a1428d28527de4b19b2abd9c52
Referer: http://stc-board.de/misc.php?action=imprint&sid=c55b64a1428d28527de4b19b2abd9c52