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: 01.05.2024 @ 13:04
Script: /misc.php?action=imprint&sid=f8f4e9a395d6e1e452bcd41a1a99d4a9
Referer: http://stc-board.de/misc.php?action=imprint&sid=f8f4e9a395d6e1e452bcd41a1a99d4a9