Today we uploaded a new build of Channels to Apple (v2.1.23). Due to some sort of bug on the App Store, it is not possible to download this app on tvOS 10.1. (If you have tvOS 10.2 beta installed, the new version works fine.)
Apple is aware of this issue and is working to resolve it. Until they do, there’s nothing we’re able to do on our end.
If your Apple TV tries to update the app, it will keep failing and ask you to select Rety or Done. Please select Done, and DO NOT delete the app as it will be impossible to reinstall it until this issue is resolved.
If you are unable to use Channels, leave a comment on this thread and we will send you a beta build you can use in the mean time (install it with TestFlight.app on your ATV)
UPDATE: On Monday March 6, Apple fixed the bug on their server that was breaking the App Store and affecting downloads of any new apps which were published since March 2nd. The Channels app is now working as expected again. If you’re still having issues, please restart your Apple TV and things should go back to normal.