OnlineSubsystemSteam error: UEngine::BroadcastNetworkFailure: FailureType = NetDriverCreateFailure, ErrorString = , Driver = NONE

I’m using the OnlineSystemSteam plugin, and I’m running it on a dedicated server. However, the method openlevel(127.0.01) is not connecting to the server. If I don’t use this plugin, I can access the game server normally."

[/Script/Engine.GameEngine]
!NetDriverDefinitions=ClearArray
+NetDriverDefinitions=(DefName=“GameNetDriver”,DriverClassName=“/Script/SteamSockets.SteamSocketsNetDriver”,DriverClassNameFallback=“/Script/SteamSockets.SteamNetSocketsNetDriver”)

UE Engine: 4.27.2

[OnlineSubsystem]
DefaultPlatformService=Steam

[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=408
GameServerQueryPort=27022
bRelaunchInSteam=false
bUseSteamNetworking=false
bAllowP2PPacketRelay=false
P2PConnectionTimeout=180
bUseLobbiesIfAvailable = false
bInitServerOnClient=false

[/Script/OnlineSubsystemSteam.SteamNetDriver]
NetConnectionClassName=“OnlineSubsystemSteam.SteamNetConnection”

ErrorMessage:
[2023.11.16-05.45.16:780][ 0]LogNet: Browse: /Game/Map/DemoServerMap?Name=Player
[2023.11.16-05.45.16:781][ 0]LogLoad: LoadMap: /Game/Map/DemoServerMap?Name=Player
[2023.11.16-05.45.16:782][ 0]LogWorld: BeginTearingDown for /Temp/Untitled_0
[2023.11.16-05.45.16:785][ 0]LogWorld: UWorld::CleanupWorld for Untitled, bSessionEnded=true, bCleanupResources=true
[2023.11.16-05.45.16:796][ 0]LogUObjectHash: Compacting FUObjectHashTables data took 1.27ms
[2023.11.16-05.45.16:859][ 0]LogAIModule: Creating AISystem for world DemoServerMap
[2023.11.16-05.45.16:859][ 0]LogLoad: Game class is ‘DemoMode_C’
[2023.11.16-05.45.16:860][ 0]LogNet: CreateNamedNetDriver failed to create driver from definition GameNetDriver
[2023.11.16-05.45.16:861][ 0]LogNet: CreateNamedNetDriver failed to create driver GameNetDriver from definition GameNetDriver
[2023.11.16-05.45.16:862][ 0]LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = NetDriverCreateFailure, ErrorString = , Driver = NONE
[2023.11.16-05.45.16:862][ 0]LogNet: NetworkFailure: NetDriverCreateFailure, Error: ‘’
[2023.11.16-05.45.16:864][ 0]LogNet: Error: LoadMap: failed to Listen(/Game/Map/DemoServerMap?Name=Player)
[2023.11.16-05.45.16:865][ 0]LogWorld: Bringing World /Game/Map/DemoServerMap.DemoServerMap up for play (max tick rate 0) at 2023.11.16-13.45.16
[2023.11.16-05.45.16:866][ 0]LogWorld: Bringing up level for play took: 0.001252
[2023.11.16-05.45.16:866][ 0]LogGameMode: Display: Match State Changed from EnteringMap to WaitingToStart
[2023.11.16-05.45.16:867][ 0]LogGameState: Match State Changed from EnteringMap to WaitingToStart
[2023.11.16-05.45.16:867][ 0]LogLoad: Took 0.085694 seconds to LoadMap(/Game/Map/DemoServerMap)
[2023.11.16-05.45.16:875][ 0]LogModuleManager: Warning: ModuleManager: Unable to load module ‘SequenceRecorderSections’ - 0 instances of that module name found.
[2023.11.16-05.45.16:876][ 0]LogInit: Display: Engine is initialized. Leaving FEngineLoop::Init()
[2023.11.16-05.45.16:876][ 0]LogLoad: (Engine Initialization) Total time: 5.46 seconds
[2023.11.16-05.45.16:877][ 0]LogLoad: (Engine Initialization) Total Blueprint compile time: 0.00 seconds
[2023.11.16-05.45.18:301][ 71]LogSteamSocketsAPI: Warning: SteamSockets API: Warning SDR network config fetch first attempt failed. HTTP 504. . Trying again.
[2023.11.16-05.45.18:854][839]LogSteamSocketsAPI: Verbose: SteamSockets API: Log Got SDR network config. Loaded revision 1700070813 OK
[2023.11.16-05.45.18:854][839]LogSteamSocketsAPI: Verbose: SteamSockets API: Log SDR RelayNetworkStatus: avail=Not Attempted config=OK anyrelay=Not Attempted (No need for SDR client network access)

Hey, I’m having the same problem. Did you find a solution?

Demo.exe 127.0.0.1:17777 -game -Multiprocess -forcepassthrough -windowed -ResX=640 -ResY=480
connect server success