Error occured during loading or editing the form => Start Tag Expected, '<' not found

Hi, I have a problem when I try to edit the form in the data section and it happens to almost of the questionnaire. İ read article about this issue but i could not solve.

Welcome to the community, @isnantosyp! Have you validated your XLSForm through this online validator? The online validator should help you identify syntax issues if there are any.

Hi, Thanks for your guidance.

Does it means that I should download the form and make it as an xls form then check it with online validator?

@isnantosyp, all you need to do is download your project as XLSForm and then validate that XLSForm through he online validator to see if there are any syntax issues in it.