I set up a Xamarin Build :
I have these errors :
I understand what he's telling me, Widget.Design.TabLayout comes from Android Support Library. I need to add Android Support Library in my Xamarin Build. For a classic xamarin project, It works this way : No resource found that matches the given name '@style/Theme.AppCompat.Light'
But on a build setting, I trully don't know ! Do you have ideas ?