After filling all fields on the "Test Information" page and saving, I still get the yellow warning: "Complete test information is required to submit a build for external testing." Why?
After a long correspondance with Apple Developer Program Support they finally told me that the yellow "!" warning was just a general reminder that you need to fill out the whole page... Well... I find it quite misleading.
And there are other strange peculiarities with the system: When I click on the specific build, the left column menu disappears, and I can't get it back. Not even by logging out and in again. But then I discovered that apparently the left column menu suddenly becomes an expand-/pulldown-menu just below the top menu line... This is a strange system - if you ask ME.
And there are other strange peculiarities with the system: When I click on the specific build, the left column menu disappears, and I can't get it back. Not even by logging out and in again. But then I discovered that apparently the left column menu suddenly becomes an expand-/pulldown-menu just below the top menu line... This is a strange system - if you ask ME.