Apple TV won't sign in - gives "Verification Failed" with known-working Apple ID login/pass.

After trying all the suggestions, putting the Roku into Guest mode and signing in under that mode is what worked for me. Obviously this doesn’t work for everyone. Wish they’d fix this, crazy it’s been going on this long. 

I did try guest mode a few times with no luck. Still getting the verification failed unfortunately. I’m goi g to open a case with Apple, let’s see what they say. 

There's nothing Roku can do to address this, as they don't create the channels for 3rd party providers. In this case, Apple has sole responsibility to make the channel work correctly. Remember that Apple sells a competing product, so they don't have a strong reason to make it work well on someone else's platform. Only user complaints directly to Apple would hold any weight in their decisions. 

Isn't it interesting that my problem is also with a 3820x (although it actually says 3820r on the box, system info indicates its a 3820X). Maybe you've got something thinking its device dependent. Anyone with a recent problem with something that is NOT a 3820?

According to Apple's site the 3820X is supported but maybe something has not been updated in the app. When launching the Apple TV app I;m not presented with the option to login in via phone and only via typing in username and passord on screen. When launching the app on a Firestick, Google TV, or really any other device besides Roku it works. To me that saus something is broken in the Apple TV app.

https://www.apple.com/apple-tv-app/devices/