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: 16.05.2024 @ 08:16
Script: /wbb2/ufp_start.php?sid=4024ab7a9cb17526446eef319e4cf45c
Referer: http://www.friendsbistro.de/wbb2/ufp_start.php?sid=4024ab7a9cb17526446eef319e4cf45c