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 @ 23:31
Script: /report.php?postid=3239&sid=f9faa2bc44343b7582f8e0aaa1f67750
Referer: http://stc-board.de/report.php?postid=3239&sid=f9faa2bc44343b7582f8e0aaa1f67750