Error when installing the package for the use of the camera

I am doing an app in Xamarin Visual Studio 2017 and when I install the package for the use of the camera it generates the following error and I do not know how to solve it.

I use the NuGet package for the camera: Xam.Plugin.Media

and here I show you the error that throws me:

I hope you can help me, Thank you very much and greetings