Hi i´m having the same problem in Visual Studio and Xamarin Studio.
I already give permission and control to that folder but keeps the same problem
Try right-clicking on Visual Studio and click 'Run as Administrator'
i did it but now popups this:
C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2,2): Error XA0000: Unexpected error - Please file a bug report at http:// bugzilla.xamarin.com. Reason: System.IO.FileNotFoundException: Could not load assembly 'Newtonsoft.Json, Version=, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile? (XA0000) (Topeka)
I already installed Mono and Gtk#
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