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: 29.04.2024 @ 00:59
Script: /search.php?sid=a9ece9aa2321cc9f30f8d91a65730ac0
Referer: http://stc-board.de/search.php?sid=a9ece9aa2321cc9f30f8d91a65730ac0