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: 11.05.2024 @ 17:05
Script: /team.php?sid=5791cb4bb3f9321caf6e41f6e1d195ec
Referer: http://stc-board.de/team.php?sid=5791cb4bb3f9321caf6e41f6e1d195ec