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 @ 16:35
Script: /search.php?searchid=55983&sid=897f00c6433510dab8f3ca49ba0c4f04&page=2
Referer: http://stc-board.de/search.php?searchid=55983&sid=897f00c6433510dab8f3ca49ba0c4f04&page=2