I did find a post on Reddit on language settings and a possible fix.
Says to make sure language in settings, I'm assuming in Google home, are
US English. And then try the setup process again. That is what I plan to
try later today.
I am having the same trouble using an iPad. He gave you the error
number. Mine is on the "Google Assistant setup screen" Mine looks like
this but the error is 9807.
https://www.google.com/search?q=domain+error+9807+google+Assistant+screen&client=ms-a...