Namespace issues when creating new Blank App (Xamarin.Forms Shared) project

I created a new Blank App (Xamarin.Forms Shared) project in VS 2013 using Xamarin.Forms 1.3.1.6296 that was obtained through the NuGet Package Manager in Visual Studio. I name the project "Mobile" and it created the following projects:

Mobile, Mobile.Android, Mobile.iOS and Mobile.WinPhone.

When I open either the MainActivity.cs (Android) or AppDelegate.cs (iOS) withour making any edits to the source code, the JustCode error underline appears under the following line of code:

LoadApplication(new Mobile.App());

It displays the following error:

"C#: Unknown type or namespace 'App' of 'Mobile'"

How do I resolve this error?