Free Inventory System - Backend

Hey, thx a lot for sharing !

So i am supposed to see something when i hit play?

I tried to use it : so in the level blueprint i spawn rInventaryActor, i add some items. Then on rInventary actor, on beginPlay i create UserInterfaceWidget and add it to view port, and i only see Inventary in a black background, there is no items.

Im doing something wrong?