SQL-DATABASE ERROR

Database error in (): Link-ID == false, connect failed
mysql error:
mysql error number:
mysql version: unknown
php version: 7.4.33
Date: 22.05.2024 @ 01:00
Script: /wbb2/kniffel_play.php?sid=781677c8ee515a28db1a933eb37542c3
Referer: http://friendsbistro.de/wbb2/kniffel_play.php?sid=781677c8ee515a28db1a933eb37542c3