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: 29.04.2024 @ 00:20
Script: /report.php?postid=85443&sid=d2a5d465bd8ab7b3179d1d27bc660d3d
Referer: http://stc-board.de/report.php?postid=85443&sid=d2a5d465bd8ab7b3179d1d27bc660d3d