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 @ 14:13
Script: /wbb2/hmportal.php?sid=3e8ec40e9e5147e5619b64bc5933c60e
Referer: http://www.friendsbistro.de/wbb2/hmportal.php?sid=3e8ec40e9e5147e5619b64bc5933c60e