It has a number in millisecond. and when I (Do It) it gives no errors in the Campanion.
but after creating the APK, this error apears, although if you see the phone screen, it has already converted the numer to the (StartDate) and the (EndDate) correctly.
sorry to say again. You need to cross check again. see your rule. If no value found, you designed rules to value as No Date in globale end date and it shows that only in app. Kindly right clcik on global end date and show us