First of all, thanks for this great update, it's much appreciated that you're now more actively developing the app again. It's such a fantastic tool.
But, unfortunately, I can confirm the same behavior here that asked described above. When I get the prompt to enter a token, it seems to accept it, asks you to login again, but there's no sync enabled. It doesn't make a difference whether I try to connect Amazon.com, Amazon.de or any other local account where the website-based 2FA login works fine.
I don't think there's much you can do wrong from a user-perspective, so it must be something with the app or with the Amazon services.
Any ideas what we could do to make this work?
Thank you and best wishes,