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 @ 10:28
Script: /wbb2/hmportal.php?sid=ac85efa9bca54c4cbdebb156cafc1464
Referer: http://friendsbistro.de/wbb2/hmportal.php?sid=ac85efa9bca54c4cbdebb156cafc1464