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 @ 23:38
Script: /report.php?postid=1587&sid=05393c849380c63e7ef4130d47fad6cc
Referer: http://stc-board.de/report.php?postid=1587&sid=05393c849380c63e7ef4130d47fad6cc