So I am trying to make a multiplayer game with a listen server. When I load my map, it loads and then emediatly goes back to the main menu after it loaded. It took a while for me to realize that it was because of the “listen” option in the Open Level node. without this option, the map loads and I can play on it.
This is my blueprint:
Just a couple of things, first, make sure that “map” is the correct name of the level. Make sure that your DefaultEngine.ini file has this somewhere, preferably at the end of the file.
[OnlineSubsystem]
DefaultPlatformService=Null
And if it still doesn’t work, then try something like this:
Instead of the open level node. Hope this helps! 
If you use Steam Subsystem:
New DefaultEngine.ini Steam subsystem settings for 4.13 update:
[/Script/Engine.GameEngine]
!NetDriverDefinitions=ClearArray
+NetDriverDefinitions=(DefName=“GameNetDriver”,DriverClassName="/Script/OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="/Script/OnlineSubsystemUtils.IpNetDriver")
[OnlineSubsystem]
DefaultPlatformService=Steam
PollingIntervalInMs=20
[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=480
GameServerQueryPort=27015
bRelaunchInSteam=false
GameVersion=1.0.0.0
bVACEnabled=1
bAllowP2PPacketRelay=true
P2PConnectionTimeout=90
[/Script/OnlineSubsystemSteam.SteamNetDriver]
NetConnectionClassName="/Script/OnlineSubsystemSteam.SteamNetConnection"
Hi, I am having the same issue. Did you ever find a solution to this problem?