Google Home "[device] isn't available at the moment"

Whenever I try to lock / unlock / ask for the status of the Nuki device using google assistant I get the error “I’m afraid it looks like the Front door isn’t available at the moment”. I tried to remove and re-add the integration several times. but it always comes up with the same error. I can use the Nuki lock with the app without a problem.

Please contact our support at contact@nuki.io for direct help on this issue as it could have multiple reasons which may need direct interaction or log-files to sort out.

I am facing the same problem. Can you please share the solution if you called the tech support?