Once you are on Setup Tab content and selected the Open answers module on the left hand side of the screen, you need to select your questions first.
Select the open ended question from the ones available and press “Apply selected”. After the question appears press save. With this you have selected the question to show in your open ended reporting module.
Once you have done that a new table appears listing the questions you have selected. You want to make sure that your Open answers tab always opens with a question and not with a blank page. In the new table that appeared select what will be your default question.