Error message while previewing my survey project

This message appears when I want to view the preview.

Erreur lors de la génération de l’aperçu

There does not seem to be a allow_choice_duplicates column header defined in your settings sheet. You must have set allow_choice_duplicates setting in your settings sheet to have duplicate choice list names in your choices sheet
Thank you to help me to overview correctly.

Welcome back to the community, @bameng4! Try validating your xlsform through this online validator, and you should be able to identify the issues present within your xlsform.

Besides, this post discussed should also help you understand and solve your issue: