Cannot press "next" button on TestFlight external test

Question

On TestFlight External Testing, I went as follows, but I could not proceed further because "Next" button was diabled.

1) Added Build to Test

2) Selected build to test

3) Input "What to test" & "Beta App Description"

Any idea how to enable the "Next" button?

Answer 1

I solved it as below:

1. Go to build list (TestFlight Builds > iOS)
2. Choose newly uploaded version
3. Fill in all fields
4. Go back to external testing
5. Select the version
6. Fill in the form
7. Next button got enabled!