Invalid or unitialized OnlineSubsystem

I am trying to connect an instance of my game to a standalone instance of a dedicated server. I am trying to do this locally/specified a null Online Subsystem in the config. I can connect to the dedicated server from the editor or a standalone build but these issues come up when I try to call Create Session with Use LAN checked. Is there something wrong with what I am doing, or am I supposed to implement an Online Subsystem? I am using blueprints to do this and running engine version 4.6.1.