JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I'm sorry, but I cannot replicate the problem to my end. In your screenshot, you have to click the "Set Quiz Answers" button to set answers. For example:
Perhaps, that is your problem? You cannot click it? Please confirm.