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: 14.05.2024 @ 11:53
Script: /wbb2/register.php?sid=59d6c38451194744671cd9b5702e6ba2
Referer: http://www.friendsbistro.de/wbb2/register.php?sid=59d6c38451194744671cd9b5702e6ba2