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: 19.05.2024 @ 10:12
Script: /wbb2/kniffel_play.php?sid=2aa82d8775e50869d80988b6d8cdb9b2
Referer: http://friendsbistro.de/wbb2/kniffel_play.php?sid=2aa82d8775e50869d80988b6d8cdb9b2