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: 13.05.2024 @ 09:44
Script: /wbb2/hmportal.php?sid=51b0314447580c9d1118f4ebf84d479e
Referer: http://www.friendsbistro.de/wbb2/hmportal.php?sid=51b0314447580c9d1118f4ebf84d479e