Seems like you once used select_multiple_from_file question type in this survey project.
You then edited and removed them. But as you had once used them in your survey project the same has caused you this error. To avoid this error message, you could have created a new survey project instead of updating the same from the existing one that uses select_multiple_from_file or select_one_from_file question type.
As a workaround kindly please be informed that you could download your data in XLS (legacy) format:
