Google Home settings can not be upgraded

Hello all,
I was able to setup gbridge on my unraid server. But if I want to link it I get the response from Google that it can’t update my settings and is therefore not linking gbridge with Google home.
Any idea what the issue may be?
I think it has something to do with the API.

Update: according to the gbridge website and the google website ( the account is linked. Only the Google Home App is misbehaving.

Updated: the Homegraph API only received a request once which ended in an error.

Has someone an idea what may be the problem?