I am trying to test google Actions Account Linking. I started preview and use the web simulator to "talk to 'my service'", then it says "It looks like your account is not linked yet..." and provided a debuginfo, then I followed the link and instructions to try to add https://oauth-redirect.googleusercontent.com/r/'proj-id' to my "Authorized redirect URIs", then before I can click on the save button, the javascript checks that and gives this message:
Invalid Redirect: uses a forbidden domain - 'googleusercontent.com' is not allowed.
Does anybody see same errors when trying google actions account linking or am I the only one doing something stupid?