I have an iOS app that I would like to distribute to beta testers via iTunes Connect and TestFlight. I archived my project, and then validated and submitted it to the App Store.
If I login to iTunes Connect and click on my app, I can clearly see my submission listed under Prelease > Builds. I have tried this 4 times now, and all 4 builds are currently ready and able to invite testers.
I have been inviting myself, as well as another approved internal tester. Every time we get the "You're invited to test.." email, we click on the "Open in TestFlight" button included in the email, and then that takes you over into the TestFlight app.
Then the TestFlight app simply shows a message of "The app isn't available. Try again." If we tap the "Try Again" button multiple times, we still get the same result.