UMG Inventory in UE4 for Pawn

[Krah]

Hi Guys,
I try to rebuild the Inventory from the Tutorial :
My Problem is i dont have a Classic Character, i use the Wheeled Vehicle.

1. I cant use a Actor at the Action Interface if i use the Actor the Value for the Health and engergy bar will not update.For these i use the Pawn Class and it Update ok ! Just i can’t connect the My Character Variable to the "Use Action Custom Event.
2. The “Use Action” and Drop Action from Action Interface dosnt work

[Krah]

Ohh my god , ok I get out

there myself . The error was due to the CallFunction i used. But i need the Message Function