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: 05.05.2024 @ 16:32
Script: /report.php?postid=86523&sid=9717944786aebd91d0a24aa4ecd4450d
Referer: http://stc-board.de/report.php?postid=86523&sid=9717944786aebd91d0a24aa4ecd4450d