The encryption information is unavailable. Try again. TestFlight

The app is uploaded without errors, but when I press the install button I get this message:

I'm using macOS Sierra 10.12 and Xcode 8.

This has never happened to me in old versions of Xcode. What could be wrong?

Solution

TestFlight is currently unavailable, i can't either install from TestFlight or see any of my builds in Itunes Connect. Also my app was in processing for 4 hours, then this happened.

Please check here https://developer.apple.com/system-status/

or this screenshot

Update: Confirmed by Apple