I ran into a glitch when doing my app. It wouldn’t let me proceed to the next page, and didn’t explain why. I sent an email to the Coalition help desk and received a pretty quick answer. In my case it turned out that I kept skipping over a question that was a mandatory response. I forget which question it was, and it was easy to miss because it was buried in a list of other questions that were optional responses. In any case, if you get to a point where the program won’t let you proceed, look very carefully at the previous questions and see if you missed a required one.