Home Assistant Register/Login Cloud Bad Gateway


I’m new to this amazing community and HA.

Today i wanted to create a HA-Cloud account to use the Android App from outside my home.

But i got some Ploblems.

The “Register Account” and the " Sign in" forms did not work.
It loades very long and then i get a 502 Bad Gateway.

So i registered online in the Browser at nabu casa. This work perfectly fine.

The HA OS on my PI works.
I installed adguard home and my router dns pointing to the HA ipv4 and ipv6 (local ip).

Everthing is working fine. But there is a problem for HA connecting outside the network?
Under Settings → System → System Health i can see:

logged_in: false
can_reach_cert_server: failed to load: timeout
can_reach_cloud_auth: failed to load: timeout
can_reach_cloud: ok

host_os: Home Assistant OS 8.2
version_api: failed to load: timeout

Can some one help me?