When I go to edit a submitted form, it gives me error message

When I go to edit my submitted form, the following message occurs.:

Error occured during the loading of this form. We do not recommend you edit this record until this is resolved.
Please contact [support@kobotoolbox.org] with the link to this page and the error message below:
Start tag expected, ‘<’ not found

Welcome to the community, @akibhassan! Would you mind downloading your survey form as XLSForm and validating it against the online validator to see any syntax issues?