Hi @Wirdawati
Welcome to the ODK forum, @Wirdawati! We're glad you're here. When you get a chance, please introduce yourself on this forum thread.
For a quick review, I noticed the "background-audio" type, which seems to be an "unknown question type", final line on the survey form. Removing this type might fix the issue.
As a tip, I recommend using the current XLSForm template to design your form. It makes things easier and more readable.