Hey, this bug happens on both- Android and iOS for me.
When creating a clean project (shared codebase, xamarin.forms) the live player functionality is working great.
As soon as I try to add (in my case) the references to Microsoft's App Center with "using Microsoft.AppCenter;" the build fails throwing:
The type or namespace name 'AppCenter' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
The code recognizes the reference and a local debug build is successful.