TestFlight: Complete test information is required to submit a build for external testing

Question

My app is in internal testing on iTunes Connect, but I cannot promote it to external testing. It tells me that the test information is incomplete.

I have tried all sorts of things, including reading this doc and this doc on Apple and re-entering all the information again. Playing with the language specifier.

This is maddening, because this exact information worked for a previous build.

Answer 1

I checked and unchecked "Sign-in required" and Saved and the warning icon finally went away.