Firestick 4k and apple TV app

1. Verify that your Roku has the correct date and time and timezone, as Apple may be more strict about that (TLS) than other content providers. 
2. Check for Fire TV software updates.
3. Check for Apple TV app updates, if not set to do so automatically.
4. Try resetting the Apple TV app.
5. Try deleting and re-installing the Apple TV app.

I'm running into the same issue. I've tried Firestick updates, uninstalling and reinstalling Apple TV, clearing the cache, restarting the Firestick, unplugging and plugging the Firestick in again, etc. Nothing worked.

Silly but true, I am planning to purchase a new iPhone and taking advantage of the 3 months free Apple TV, but this is holding me back.

No. I have the same problem and am beyond frustrated. After researching the problem, reading countless posts with a wild variety of suggestions just short of balancing on one leg while typing in my password :-), restarting TV/Firestick/app countless times, uninstalling and reinstalling app, changing Apple ID password -- I've given up and am returning the Firestick 4K. The picture was great, but it's not worth the frustration. I'm going back to my old fire stick (which worked just fine) until the engineers can figure this out. All of my other apps worked just fine. Why on earth can't Amazon & Apple fix this?

I wish I had the other post at hand but I haven't read it's all issue with the Apple TV app and requires an update from Apple. So all those days I spent trying to get this working was wasted and I'll hold off on the new iPhone until it's fixed.

Nothing Works! Reset reinstall delete clear data clear cache… nothing works! I spoke to countless Amazon people & 2 Apple support. Each blaming one another. 3 hrs on my life wasted. Hopefully this post saves someone else the frustration!

Thank you Meister for sharing! I wish I would have seen this hours ago. Lol

I have the same problem and it doesn't work.