Hello, i want to create choose filter for region and district but getting errors: "The survey sheet is either empty or missing important column headers. Your file should have the .xlsx, .xml file extension because Ona uses XLS Forms to create forms."
Welcome to the ODK forum, @Ibrahim4265 ! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a picture as your avatar because it helps build community!
This forum is for the core ODK software. For issues using Ona you will need to check their support options: https://help.ona.io/contact-support/
It sounds like your XLSForm does not have a survey worksheet with the 3 mandatory columns:
label. You can read the documentation at: