Some Problems with the Unity Samples: UI Package

Unity Engine
1

I’m using the latest 5.1.1f1 and imported the package in a brand new project.

  1. It gives me two errors of the same name:
    Prefab has multiple Transform components! Removing them automatically would not be safe.
    When I click on that error, it gives me a new error message:
    UnityEditorInternal.InternalEditorUtility:GetGameObjectInstanceIDFromComponent(Int32)
    UnityEditor.DockArea:OnGUI()
    I cannot figure out which prefabs lead to this error.

  2. Menu 3D demo scene is not working. I cannot see the menu.
    I saw someone wrote the review saying his problem was the menu animator missing transitions. However I have checked mine and the transitions are all there.
    I can only see the outlines of the menu buttons in the Scene tab, and nothing in the game.

  3. This package overrides project settings, and this is the reason why I imported it to a brand new project. I’ve tried both letting it override the settings and not letting it override the settings. Both gave the same error and problem, except that letting it override settings gave one more error/warning about rebaking NavMesh.
    I have no idea whether I should let this package override the project settings.

2

Same thing. Reinstalling Unity didn’t help.