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 @ 16:28
Script: /wbb2/index.php?hidecat=2&sid=69bc5fd2a7ee4d82145fd17f5c3839c7
Referer: http://www.friendsbistro.de/wbb2/index.php?hidecat=2&sid=69bc5fd2a7ee4d82145fd17f5c3839c7