Fatal Error on Get More Components

Hello guys,

Xamarin crashes when I try to Add a Component in my android project. Specifically, when i click on Components -> Get More Components, Xamarin crashes, and a pop up error appears; this is the text of error:

Fatal Error as Occurred Details of this error have been automatically sent to Xamarin for analysis. Xamarin Studio will now close.

Details

System.NullReferenceException: Riferimento a un oggetto non impostato su un'istanza di oggetto -->(in italian, No reference to object)
       at Xamarin.Ide.Windows.ComponentBrowserThreadWrapper.<>c__DisplayClass6.<LoadLoadingPage>b__3()
       at Xamarin.Ide.Windows.ComponentBrowserThreadWrapper.LoadLoadingPage(WindowsComponentStoreBrowser browser)
       at Xamarin.Ide.Windows.WindowsComponentStoreBrowser.Run(String url)
       at Xamarin.Ide.Windows.ComponentBrowserThreadWrapper.<>c__DisplayClassb.<Run>b__8()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()

Someone can help me?

Thanks a lot