Casting from BP to C++

Hi everyone,
I’ve been following this tutorial Unreal Engine 4 C++ Tutorial: Health Bar and UI HUD - YouTube. I have been following to build the UI for my game which is a simple game timer. I am having a problem with casting to the c++ character in blueprints. In i BP when i drag from Get Player Character my c++ ball doesn’t appear and I don’t know why that is my best bet would be this line in my GameMode file.

MyCharacter = Cast(UGameplayStatics::GetPlayerPawn(this, 0));

Any help would be appreciated, if you need to see anymore code let me know and I’ll post it.