UE 5.3 Steam Sockets gives errors

Development Programming & Scripting
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1

I have a working multiplayer via online subsystem and advance session, using p2p. I’m trying to connect steam sockets. I did it according to documentation, connected plugin, added necessary lines to windowsengine file.

At startup I get warning errors
1 LogSteamShared: Warning: Steam Dedicated Server API failed to initialize.
2 LogOnline: Warning: STEAM: Failed to initialize Steam, this could be due to a Steam server and client running on the same machine. Try running with -NOSTEAM on the cmdline to disable.
3 LogOnline: Warning: STEAM: Steam API failed to initialize!
4 LogSockets: Warning: Unable to load SocketSubsystem module SteamSockets
5 LogUObjectGlobals: Warning: Failed to find object ‘Class /Script/SteamSockets.SteamNetSocketsNetDriver’
6 LogNet: Warning: Error initializing the pending net driver. Check the configuration of NetDriverDefinitions and make sure module/plugin dependencies are correct.
7 LogNet: Warning: Travel Failure: [PendingNetGameCreateFailure]: Error creating network driver.
8 LogSockets: Warning: Unable to load SocketSubsystem module SteamSockets.

Critical errors
1 LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = NetDriverCreateFailure, ErrorString = , Driver = NONE
2 LogNet: Error: LoadMap: failed to Listen(/Game/ThirdPerson/Maps/ThirdPersonMap??listen)

2

I think I found a solution, at least for UE5.7, by cross referencing Engine Files

[/Script/Engine.GameEngine]

+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="SocketSubsystemSteamIP.SteamNetDriver",DriverClassNameFallback="SocketSubsystemSteamIP.SteamNetDriver")

[OnlineSubsystem]

DefaultPlatformService=Steam

[SocketSubsystemSteamIP]

bEnabled=true

SteamDevAppId=4314530

GameServerQueryPort=27022

bRelaunchInSteam=true

bUseSteamNetworking=true

bAllowP2PPacketRelay=true

P2PConnectionTimeout=180

bUseLobbiesIfAvailable = true

bInitServerOnClient=true

[/Script/SocketSubsystemSteamIP.SteamNetDriver]

NetConnectionClassName="SocketSubsystemSteamIP.SteamNetConnection"

Looking into the code it appears the issue is that the Engine/game can’t create the class for the steam driver and so even though you can create a session, joining will always boot you out. I have been able to get my project working without using the -NOSTEAM using this INI thing. Unsure if it will work with other people’s projects but worth a shot if you’re still bugfixing or like me, looking through the internet for any solution.