When I import the latest Unity Package into Unity 5.6.4f1 on a Mac, I get the following compile error in GameSparksSettingsEditor.cs
public static GameSparksSettings GetOrCreateSettingsAsset(
The type or namespace name 'GameSparksSettings' could not be found
This happens on a Mac. I haven't had any compile problems on Windows.
Are you seeing the same behavior on Unity 2017 ? What SDK were you on before you upgraded to the latest version ?
**Edit** Addressed in ticket.