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: 10.05.2024 @ 22:41
Script: /search.php?sid=8ea582f6a0e6b0d2e5cf2637f2797750
Referer: http://stc-board.de/search.php?sid=8ea582f6a0e6b0d2e5cf2637f2797750