Survey won't run, elements undefined


I am trying to help a student get their survey up and running. When we try to run the experiment it goes grey, and we get this error when using F12

TypeError: surveyData.surveys[surveyIdx].pages[i].elements is undefined

I’m looking through the survey and there’s nothing odd with page numbers, so my guess is an issue with the surveyIdx

Any thoughts?

Never mind, I have found the answer in a different post! (Well done search engines, you’re getting really bad).

The final question had no question, only a description. This caused the error.