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 @ 11:57
Script: /report.php?postid=85306&sid=2f843dc8d94aea0b5c829f82dfc080d6
Referer: http://stc-board.de/report.php?postid=85306&sid=2f843dc8d94aea0b5c829f82dfc080d6