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: 02.05.2024 @ 17:48
Script: /report.php?postid=79538&sid=695050cc2c7b7e6133b7aa67e9c5ea22
Referer: http://stc-board.de/report.php?postid=79538&sid=695050cc2c7b7e6133b7aa67e9c5ea22