Error Occured

in my kobocollect i am receving the following error.

Erroro evaluating ‘survey’(/a5CQhxGoCudz7LuvdTS68/survey[1]): the problem was located in condition expression for /a5CQhxGoCudz7LuvdTS68/survey XPath evalution: type mismatch This field is repeated:


You may need to use the indexed-repeat() function to specify which value you want.
your assistance will be greatly appreciated

Would you mind validating your XLSForm through this online validator to see if there are any syntax issues in your XLSForm?