Problem with @(Content) in Visual Studio with Xamarin

Hi!

I have a problem.I created a solution (mobile apps) and when execute, I get the following warning : Warning XA0101: @(Content) build action is not supported (XA0101). and then the android emulator produce and internal error. ( see the picture Captura4.png)

I would like to know if is a problem the android SDK or another library and how could fix.

Thanks for you help,!!