RowDefinitions/ColumnDefinition not working on WindowsPhone but works fine on WindowsPhone emulator

Question

When I try to run the app on windows emulator it runs fine but when I try to run on a windows phone it gives the following error

Object of type 'Xamarin.Forms.ColumnDefinition' cannot be converted to type 'Xamarin.Forms.View'

I am getting this error at the following lines

<Grid.ColumnDefinitions>


</Grid.ColumnDefinitions>