Nest - Unable to save changes

Configuration
1

I’ve been trying to set up the Nest integration for a couple of days without success. I think my GCP project is set-up correctly and so is my Console Device access since I’m reaching the permission screen (and it even sees my doorbell):

Capture d’écran 2022-10-13 125526
Capture d’écran 2022-10-13 1255261381×1918 228 KB

But as you can see I can’t click any of the toggles, everytime I do it it reverts back to off with this “unable to save changes”.

I’m curious what could cause that error? Could it be that GCP/Nest can’t reach my home assistant setup? Or could it be related to this deprecation I saw in the Nest doc:

Auth for Apps has been deprecated by Google and will break by October 2022.

2

So I finally found what was causing the issue. For some reason the email used by the nest screen was not my main google one.
So in case it happens to someone else, go to https://myaccount.google.com/email?hl=en and remove some “about me” emails.