What do you mean by the tvOS does not work? Do you mean that you have tested this on a tvOS device and it is not working at all? Or do you mean that you simply cannot upload the tvOS to the App store and are getting the above message from Apple?
Looking at the above message from Apple, the part about having push notifications is easily corrected by enabling push notifications on in the iTunes connect settings. Also, even if you did not correct this, it is only a warning and would ultimately allow you to publish regardless of if you fixed this.
However, this part: “This app attempts to access privacy-sensitive data without a usage description. The app’s Info.plist must contain an NSCalendarsUsageDescription key with a string value explaining to the user how the app uses this data.”
-Your app is trying use the end-user’s personal data and you have to do just what it says. This is not a bug with UE4 but something you have to correct.