Xamarin iOS error: Can not resolve reference

Question

If I set up a Xamarin.Forms Solution in VS 2013 and try to run the iOS Version, it fails because of the following error:

Error 2 Can not resolve reference: /Users/Koray/Library/Caches/Xamarin/mtbs/builds/WalkiOS/aae389efbebffd5cd3625dcf99aad02c/C:/Program Files (x86)/Reference Assemblies/Microsoft/Framework/Xamarin.iOS/v1.0/Facades/System.Collections.Concurrent.dll Walk.iOS

The Xamarin Build Host for Visual Studio is set up and a few weeks ago it worked fine. I can't find anything to fix the error.

Answer 1

The solution is to update Xamarin on both machines to the same version. It should work fine if you do this.