After I updated and redeployed the form developed in Kobo several times, a 500 error occurred the last time. I don’t understand what happened since the form was created in Kobo.
Welcome to the community, @meal_officer_ua! Have you validated your XLSForm through this online validator? The online validator should help you identify syntax issues, if any, that are affecting the form deployment.
This post discussed previously should help you use the online validator.