according to the minimum requirements you must have a 64 bit system. this means that you cannot play using a 32 bit system. its a hardware issue so theres nothing you can do about it. if your system only supports 32bit then its probably pretty old and the rest of your hardware may not be up to running the game anyways.
also this is not the place for support for fortnite there is a dedicated place for that. this answerhub is for questions relating to developing in the unreal engine.