This form can't be distributed as it is asking for personal or sensitive information

At my school, a teacher received this message when she was taking a course questionnaire. She didn't have any personal questions, just questions about the contents of the discipline. Since then, she has not been able to take questionnaires, because the same alert always appears. The IT administrator received the alert, but could not prevent it from repeating itself. My colleague can't figure out what she's doing wrong! Microsoft, what policy is this?! If this continues, we'll have to stop using Forms!