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: 10.05.2024 @ 15:04
Script: /search.php?sid=bb4febd0f331c48aad2d39e22b916c66
Referer: http://stc-board.de/search.php?sid=bb4febd0f331c48aad2d39e22b916c66