I followed the instructions here and when I try to add my “test” the page tells me the accounts are now linked, but at the bottom of the screen it says
Someting went wrong. Try again. I clicked on the option to open the page in a web browser (instead of Google Assistant) and I get the following:
Your client does not have permission to the requested URL
/services/auth/handoffs/auth/complete?state=AAABBBCCC&return_url=comgoogleopa://settings/handoff. That’s all we know.