error using the Plugin.Xamarin.Controls with ios project

When using the Plugin.Xamarin.Controls the IOS project throws the following error in the AppDelegate.cs
global::Xamarin.Forms.Forms.Init();
error
System.TypeLoadException: 'VTable setup of type Xamarin.Forms.Forms+IOSPlatformServices failed'
When I remove Plugin.Xamarin.Controls the app loads the moment I added it back in the app fails to load.
Any Idea why. All the Dependencies are referenced.
Thanks
Bill