Received invalid command: hacs/subscribe about home-connect-hass HOT 2 CLOSED

I think the aboce messages are not home_connect_alt related, but they are from hacs itself.
However, after some more restarts, I don't see those messages, but also I don't see any home_connect_alt related entities.
I have the lines in configuation.yaml

logger:
default: warning
logs:
home_connect_async: debug
home_connect_alt: debug
custom_components.home_connect_alt: debug

and I have the lines
home_connect_alt:
client_id: (my id)
client_secret: (my secret)

Nothing shows up in the logs and nothing in the entities.
I only see Home Connect Alt in the HACS.

from home-connect-hass.

My bad, I missed the last step in installation.
Now it seems that the home connect servers are down, but that's not a problem for here.

{
"error": {
"key": "503",
"description": "Home Connect subsystem not available. Please try it again."
}
}

from home-connect-hass.