AdMobBuddy dependency

Hi all,
I would use AdMobBuddy and I added 1.0.6 version from nuget repository. When I build project I get the following error:
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets: Error:
Exception while loading assemblies: System.IO.FileNotFoundException:
Could not load assembly 'AdMobBuddy.Forms.Plugin.Abstractions, Version=1.0.0.0, Culture=neutral, PublicKeyToken='.
Perhaps it doesn't exist in the Mono for Android profile?
File name: 'AdMobBuddy.Forms.Plugin.Abstractions.dll'
at Xamarin.Android.Tuner.DirectoryAssemblyResolver.Resolve (Mono.Cecil.AssemblyNameReference reference, Mono.Cecil.ReaderParameters parameters)
[0x00000] in :0
at Xamarin.Android.Tuner.DirectoryAssemblyResolver.Resolve (Mono.Cecil.AssemblyNameReference reference) [0x00000] in :0
at Xamarin.Android.Tasks.ResolveAssemblies.AddAssemblyReferences (ICollection`1 assemblies, Mono.Cecil.AssemblyDefinition assembly, Boolean
topLevel) [0x00000] in :0
at Xamarin.Android.Tasks.ResolveAssemblies.Execute () [0x00000] in :0 (AbruzzoByNight.Droid)

What is missing?

Thanks.