How to make Amundi banking app (Mon Épargne) activate double authentication

Since activation of double authentication, Amundi app doesn’t manage to login to my account.
I activated my FP4 Murena as trusted device but the notification that should pop-up to confirm the connection never appears.
Since then, even on a computer, I cannot access my account since the login relies on my trusted device where the notification doesn’t show up.

Did activate ‘Cloud-Messaging’ under System->microG??

Hello,
Yes, the option is activated. For more information, I have no Google account setup and no registration in Google services.

Google account is not needed in this case but device registration should also be active if I remember correctly.

And I really do if you look here:

https://doc.e.foundation/calls_to_google_servers#device-registration-microg

Hi again,
I’ve registered. I also had to deactivate blocking trackers. And now it works !!
Thanks very much for your help !

Maybe you should have kept the trackers blocked for the first try. That is the whole reason you came to /e/OS.

I did but it wasn’t working. Now that the system works, I’ve blocked them again.