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 @ 20:31
Script: /team.php?sid=99e2562abcd0f9014a0bc1d6a14bbc9b
Referer: http://stc-board.de/team.php?sid=99e2562abcd0f9014a0bc1d6a14bbc9b