title: Testflight is crashing
body: <p>TestFlight is crashing before my app has a chance to run.</p>
  
  <p>I have an iOS app I'm planning to distribute to external testers.  The build has been approved for TestFlight testing.  I invited myself (under a different apple ID than the one I use for development) to be the first tester.  In TestFlight, I hit "redeem" and type the invitation code I was sent.  For a brief fraction of a second I see a screen popup that says "redeeming app", then TestFlight kicks me out to my home screen.  I've found that it doesn't matter what I input for the invitation code -- it's probably crashing before it even has a chance to communicate with the Apple servers.</p>
  
  <p>Has any one else experienced this issue?</p>