I proceed with this tutorial https://www.home-assistant.io/integrations/google_assistant/#google-cloud-platform-configuration and got stuck on 6.2:
Select the + button on the top left corner, select Set up device. In the Set up a device screen, select Works with Google. You should have [test] <Action Name> listed under Add new. Selecting that should lead you to a browser to login your Home Assistant instance, then redirect back to a screen where you can set rooms and nicknames for your devices if you wish.
The [Test] light shows there, when I click it, it shows me Link an account to control Light on any device. I click Continue and than it leads me to the page that is supposed to lead me intro HA login, but there is that 404 page show on image.
I'm glad for every response!