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: 10.05.2024 @ 00:43
Script: /report.php?postid=86344&sid=e0e17a8e6ddaa64f87f3313c69c8cacf
Referer: http://stc-board.de/report.php?postid=86344&sid=e0e17a8e6ddaa64f87f3313c69c8cacf