Attempting to open an iOS application in TestFlight generates an "Application is not available. Please try again."

Question

I have an iOS application that I would like to distribute to beta testers via iTunes Connect and TestFlight . I archived my project and then validated it and sent it to the App Store .

If I log into iTunes Connect and click on my application, I can clearly see my view as indicated in the Prelease > Builds section. I have tried this 4 times now, and all 4 builds are currently ready and can invite testers.

I invite myself, as well as another approved internal tester. Each time we receive the email "You're invited to test.." , we click on the "Open in TestFlight" button included in the email and then transfer you to the TestFlight application.

Then the TestFlight application simply displays the message "The app isn't available. Try again." . If we click the "Try Again" button several times, we will still get the same result.

Answer 1

I got an answer! Just turn off "TestFlight Beta Testing" in Preerelease → Builds → TestFlight Beta Testing. And then turn it on.