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: 08.05.2024 @ 21:02
Script: /report.php?postid=85231&sid=09d24d3ac92c0172f0eb51ca2f2400c1
Referer: http://stc-board.de/report.php?postid=85231&sid=09d24d3ac92c0172f0eb51ca2f2400c1