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: 21.05.2024 @ 01:04
Script: /wbb2/hmportal.php?sid=d24d39e0a6eb7a3bc3e3c6b1d8002816
Referer: http://www.friendsbistro.de/wbb2/hmportal.php?sid=d24d39e0a6eb7a3bc3e3c6b1d8002816