How to create "object" inside blueprint?

I made a empty object with one variable:

And I would like to use this objekt in another bp:

But problem is that after startup I am getting an erorr:
Blueprint Runtime Error: “Accessed None trying to read property BPObjekt”. Node: Print String Graph: EventGraph Function: Execute Ubergraph BP Game State Blueprint: BP_GameState

Looks like that my object is nullpointer