@hutabaratrensi29, here is a workaround for adding a skip logic to a repeat group as advised by @hakan_cetinkaya.
Regarding your latest issue of having validation issues when validating your XLSform through the online validator, you will need to keep fixing the issue in your XLSform and then revalidate the XLSForm with the online validator again (until every syntax issue from your XLSForm is clear).

