SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Can't connect to MySQL server on 'gammer.store.d0m.de' (146)
mysql error number: 2003
mysql version: unknown
php version: 5.6.40
Date: 12.08.2020 @ 15:15
Script: /thread.php?postid=278118
Referer: