Problems on Xamarin.Forms using Shared project

Hi,

Just created a new empty project on Xamarin.Forms using Visual Studio and when I add a new XAML page on the shared project it does not detect the namespace and neither support us to build the project.

Also Windows Phone project for some reason is showing weird errors:

Error 8 Manifest validation fails: Exception: The 'ProductID' attribute is invalid - The value '1a986840-1057-4201-8c7d-503f6d83065d' is invalid according to its datatype 'http://WPCommontypes:ST_Guid' - The Pattern constraint failed. FomsPOC.WinPhone

Error 9 Manifest validation fails: Exception: The 'PublisherID' attribute is invalid - The value '45bfb2ad-0dfc-4bad-8e3f-5fa9a57ff4df' is invalid according to its datatype 'http://WPCommontypes:ST_Guid' - The Pattern constraint failed. FomsPOC.WinPhone

Attached a screenshot with all the errors...

Should I file a bug or am I doing something wrong? It's a stoppable bug and wont allow us to move forward with the development.

THanks
Gutemberg