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: 09.05.2024 @ 18:40
Script: /report.php?postid=71405&sid=7e8ace3e7b7ac6fcd1ba05907eb3091c
Referer: http://stc-board.de/report.php?postid=71405&sid=7e8ace3e7b7ac6fcd1ba05907eb3091c