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 @ 19:40
Script: /search.php?action=user&userid=74&sid=0731634b06e92d59f74a42f920d583b1
Referer: http://www.stc-board.de/search.php?action=user&userid=74&sid=0731634b06e92d59f74a42f920d583b1