Network Calling Function from Client on Server Problem

well, the crash doesn’t have any information. It occurs when I try to call “SpawnDefaultController()” in my Pawn’s Constructor. Does this happen because “DefaultPawnClass== NULL” in my gamemode? I want to call PlayerController->Possess() but to do this from inside my pawn I need a reference to it, which I don’t have. Do I call the Posses from outside my Pawn, in the class where I spawn it?