When creating a new solution within Xamarian studio I get this error
Could not install package \'Xamarin.Forms 1.0.6186\'. You are trying to install t
I had the same problem with my Xamarin project. The problem was, that in the portable Xamarin project Windows Phone Silverlight was set as target. The PCL project from which I created the nuget, didn't reference Silverlight as target. I don't need Silverlight, so uninstalling all nuget packages from my portable Xamarin project, removing silverlight as target and reinstalling the NuGet packages solved it.