Thanks Alex for your fast response.
The strange thing about this is that the example works correctly if the scene Hand UI is runned in Unity from the Leap package motion example from Modules -> InteractionEngine -> Examples -> 4.Hand UI- -> Hand UI
However, when I replicate the example, in a new project, without any other additional scene, only for learning purpose, with the same tree structure, the same GameObjects names, same labels, same etc ... always throws NullException pointing to item "Palm UI Pivot Anchor".
I had attempt insert it in my project and result is the same.
Leap Motion Orion SDK: Leap_Motion_Setup_4.0.0+52173.exe (from Leap Motion page)
All installed Assets from LM Developer Page:
Hands Module (2.1.4)
Leap Motion Interaction Engine (1.2.0).
Newly, Thanks for your help.