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: 09.05.2024 @ 00:36
Script: /report.php?postid=619&sid=bc1b8dd8e1d5d4e17624d2e0d30ad8c3
Referer: http://stc-board.de/report.php?postid=619&sid=bc1b8dd8e1d5d4e17624d2e0d30ad8c3