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: 08.05.2024 @ 06:32
Script: /misc.php?action=faq2&sid=08c3f9e647fed428c6e3c2c9dd0c2071
Referer: http://www.stc-board.de/misc.php?action=faq2&sid=08c3f9e647fed428c6e3c2c9dd0c2071