You can try following alternative depending on how the final score is displayed. ie at each step or at the very end once all Qs have been answered… you can try this: add task button to perform the same function as your current action button the difference will be one button at the end of questionnaire rather than at each question/answer submission.
step 1: under automation create schedule task against your question/answer table and set to OnDemand and not scheduled.
step 2: add task component (button) at end of page containing list. configure task button to do same thing as current action button.
Note: ensure all answers per unique user are stored in a separate table. I’m sure you already got this bit sorted.