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 @ 09:02
Script: /team.php?sid=84b93a48a7f6c70eff8755b44ee8f2ac
Referer: http://stc-board.de/team.php?sid=84b93a48a7f6c70eff8755b44ee8f2ac