Nevermind, I just forgot to plug the return value from my spawn actor node to the “In Pawn” Possess node and now I just came back to my previous error which is : I can’t spawn two player because my keyboard and my controller can both move my character, so thanks anyway
EDIT : The node “Get All Active Players” always return user id 0 and number of active platform users 1, so I believe there is an error from here