MasterDetailPage in NagigationPage

Has anyone realized that a MasterDetailPage cannot be launched as a NavigationPage after moving the app to Unified API with the latest stable Xamarin Forms?

Basically this code doesn't work anymore since the updgrade:

public static Page GetMainPage ()
{
return new NavigationPage(new RootPage());
}

RootPage in this case is a MasterDetailPage

I get the error : System.InvalidOperationException: Sequence contains no elements

Please help...