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: 06.05.2024 @ 13:33
Script: /forgotpw.php?sid=e796c4b3be21e83d2500592a6035442b
Referer: http://stc-board.de/forgotpw.php?sid=e796c4b3be21e83d2500592a6035442b