# Advanced Sessions Plugin – Unable to Join Sessions (UE5) **URL:** \ **Category:** Multiplayer & Networking\ **Tags:** joining-session, unreal-engine, Blueprint, question\ **Created:** [June 27, 2025, 7:17pm UTC](https://forums.unrealengine.com/t/advanced-sessions-plugin-unable-to-join-sessions-ue5/2582125 "2025-06-27T19:17:13Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![X\_Hangman\_X](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/x_hangman_x/32/1080397_2.png) [@X\_Hangman\_X](https://forums.unrealengine.com/u/X_Hangman_X)\ **Post date:** [June 27, 2025, 7:17pm UTC](https://forums.unrealengine.com/t/advanced-sessions-plugin-unable-to-join-sessions-ue5/2582125/1 "2025-06-27T19:17:13Z")
Hello everyone! I know this question has been asked many times, and I’ve read everything I could find on the topic — but I still can’t get it to work! I’ve spent over 40 hours this past week trying to solve it, and I’m stuck. Does anyone have an idea what I am doing wrong, or is the plugin broken? > **My theory** > Looking at the logs, it seems like I’m trying to join the **MainMenu** map, while the host (running a listen server) has already switched maps using `?listen`. > These log lines make me think something isn’t working correctly with the **Steam subsystem**. The logs mention the `IpNetDriver`, this should be `SteamNetDriver` I think? ```auto LogSockets: Warning: GetAddressInfo failed to resolve host with error SE_HOST_NOT_FOUND [11001] LogNet: UNetConnection::Close: [UNetConnection] RemoteAddr: , Name: IpConnection_2147482359, Driver: Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482422, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID, Channels: 3, Time: 2025.06.27-18.55.50 LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = PendingConnectionFailure, ErrorString = Your connection to the host has been lost., Driver = Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482422 ``` > About the Project - Build editor from source 5.6.0 - Using Advanced Sessions Plugin 5.6 from [here](https://vreue4.com/advanced-sessions-binaries). - C++ and Blueprint, only doing Blueprint code so far. (With one empty C++ class) > What I did so far - Build the Engine from source - Added Plugins to Project - Added new C++ class - Created AdvancedFreindsGameInstance and implemented OnSessionInvitaAccepted - Updated .uproject, .ini and Build.cs - Cleaned and Re-Compiled Project successfully - Added steam\_appid.txt to Build and Project directory - Packaged Project for WinDev > What works - Steam interface - Creating a session via CreateAdvancedSession - Finding sessions via FindSessionsAdvanced > What does not work - Joining the session via FindSessionsAdvanced → JoinSession - Joining Session via Steam-Invite The client will get an error and the host will see a successful join. Testing on two different machines with two different Steam accounts but the same build from one machine. > Debug output Client joining via ServerList ```auto LogSteamShared: Display: Loading Steam SDK 1.57 LogSteamShared: Steam SDK Loaded! LogOnline: Verbose: STEAM: Steam: Starting SteamWorks. Client [1] Server [1] Setting breakpad minidump AppID = **** SteamInternal_SetMinidumpSteamID: Caching Steam ID: *** [API loaded no] LogOnline: STEAM: Steam User is subscribed 1 LogOnline: STEAM: [AppId: ***] Client API initialized 1 LogOnline: STEAM: [AppId: ***] Game Server API initialized 1 LogOnline: Verbose: STEAM: Created thread (ID:7092). LogOnline: OSS: Created online subsystem instance for: STEAM LogOnline: OSS: TryLoadSubsystemAndSetDefault: Loaded subsystem for type [STEAM] | V Verbose: STEAM: Starting search for Internet games... LogOnline: Verbose: STEAM: FOnlineAsyncEventSteamLobbyUpdate LobbyId: Lobby[0x1860000D8028E35] LogOnline: Verbose: OSS: Async task 'FOnlineAsyncTaskSteamFindLobbiesForFindSessions bWasSuccessful: 1 NumResults: 1' succeeded in 0.309148 seconds LogOnlineSession: STEAM: Found 1 lobbies, finalizing the search LogOnlineSession: STEAM: Search result 0: LobbyId=Lobby[0x1860000D8028E35], LobbyId.IsValid()=true, CSteamID(LobbyId).IsLobby()=true LogScript: Script Msg: Found a session. Ping is 9999 | V Verbose: STEAM: FOnlineAsyncEventSteamLobbyEnter LobbyId: Lobby[0x1860000D8028E35] Result: '1' k_EChatRoomEnterResponseSuccess (Success) LogOnline: Verbose: STEAM: FOnlineAsyncEventSteamLobbyUpdate LobbyId: Lobby[0x1860000D8028E35] LogOnline: Verbose: OSS: Async task 'FOnlineAsyncTaskSteamJoinLobby bWasSuccessful: 1 Session: GameSession LobbyId: Lobby[0x1860000D8028E35] Result: '1' k_EChatRoomEnterResponseSuccess (Success)' succeeded in 0.248246 seconds LogOnlineVoice: OSS: StartLocalProcessing(0) returned 0xFFFFFFFF LogOnlineVoice: OSS: Starting networked voice for user: 0 LogOnlineVoice: OSS: RegisterLocalTalker(0) returned 0x00000000 LogOnlineVoice: OSS: Invalid user specified in RegisterLocalTalker(1) LogOnlineVoice: OSS: Invalid user specified in RegisterLocalTalker(2) LogOnlineVoice: OSS: Invalid user specified in RegisterLocalTalker(3) LogOnlineSession: STEAM: Using P2P Data for Connection Serialization LogOnlineSession: OSS: Join session: traveling to steam.76561198094895081:7777 LogBlueprintUserMessages: [DungeonGameInstance_C_2147482570] Joined Session LogGlobalStatus: UEngine::Browse Started Browse: "steam.76561198094895081/Game/TheDungeonProject/Levels/Level_MainMenu" LogNet: Browse: steam.76561198094895081/Game/TheDungeonProject/Levels/Level_MainMenu | V Created socket for bind address: 0.0.0.0:0 LogNet: IpConnection_2147482359 setting maximum channels to: 32767 PacketHandlerLog: Loaded PacketHandler component: Engine.EngineHandlerComponentFactory (StatelessConnectHandlerComponent) LogHandshake: Stateless Handshake: NetDriverDefinition 'GameNetDriver' CachedClientID: 4 LogNet: Game client on port 7777, rate 100000 LogNetVersion: TheDungeonProject 1.0.0.0, NetCL: 0, EngineNetworkVersion: 42, GameNetworkVersion: 0 (Checksum: 1220682179) LogSockets: Warning: GetAddressInfo failed to resolve host with error SE_HOST_NOT_FOUND [11001] LogNet: UNetConnection::Close: [UNetConnection] RemoteAddr: , Name: IpConnection_2147482359, Driver: Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482422, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID, Channels: 3, Time: 2025.06.27-18.55.50 LogNet: UNetConnection::SendCloseReason: LogNet: - Result=AddressResolutionFailed, ErrorContext="AddressResolutionFailed" LogNet: UChannel::Close: Sending CloseBunch. ChIndex == 0. Name: [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: , Name: IpConnection_2147482359, Driver: Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482422, IsServer: NO, PC: NULL, Owner: NULL, UniqueId: INVALID LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = PendingConnectionFailure, ErrorString = Your connection to the host has been lost., Driver = Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482422 LogNet: Warning: Network Failure: PendingNetDriver[PendingConnectionFailure]: Your connection to the host has been lost. LogNet: NetworkFailure: PendingConnectionFailure, Error: 'Your connection to the host has been lost.' LogNet: DestroyNamedNetDriver: Name:PendingNetDriver Def:GameNetDriver IpNetDriver_2147482422 LogRHI: Display: Encountered a new graphics PSO: 1911018763 LogGlobalStatus: UEngine::Browse Started Browse: "/Game/TheDungeonProject/Levels/Level_MainMenu?closed" LogNet: Browse: /Game/TheDungeonProject/Levels/Level_MainMenu?closed LogNet: Connection failed; returning to Entry LogLoad: LoadMap: /Game/TheDungeonProject/Levels/Level_MainMenu?closed LogWorld: BeginTearingDown for /Game/TheDungeonProject/Levels/Level_MainMenu LogWorld: UWorld::CleanupWorld for Level_MainMenu, bSessionEnded=true, bCleanupResources=true ``` > Accepting and invite > > ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/c/9/4c9c6b32b7cbd575cef895a5760aa71ae93eacf6.png) > Creating a session > > ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/0/8/4/0844db06c25b387143ae95b57c250b83d54f1cea.jpeg) > Joining a session via ServerList > > ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/a/b/5ab159669705382b371cb93fa9d26e411c112c40.jpeg) > Game.uproject ```auto { "FileVersion": 3, "EngineAssociation": "{1C66A00B-408B-CA94-EF65-18953AAB5918}", "Category": "", "Description": "", "Modules": [ { "Name": "Game", "Type": "Runtime", "LoadingPhase": "Default" } ], "Plugins": [ { "Name": "ModelingToolsEditorMode", "Enabled": true, "TargetAllowList": [ "Editor" ] }, { "Name": "AdvancedSessions", "Enabled": true }, { "Name": "AdvancedSteamSessions", "Enabled": true }, { "Name": "OnlineSubsystemSteam", "Enabled": true }, { "Name": "SteamShared", "Enabled": true }, { "Name": "OnlineSubsystem", "Enabled": true } ], "TargetPlatforms": [ "Windows" ] } ``` > DefaultEngine.ini ```auto [/Script/Engine.GameEngine] !NetDriverDefinitions=ClearArray +NetDriverDefinitions=(DefName="GameNetDriver", DriverClassName="OnlineSubsystemSteam.SteamNetDriver", DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver") [OnlineSubsystem] DefaultPlatformService=Steam bHasVoiceEnabled=true [OnlineSubsystemSteam] bEnabled=true SteamDevAppId=*** (My own from steam) SteamAppId=*** (My own from steam) ; If using Sessions bInitServerOnClient=true [/Script/OnlineSubsystemSteam.SteamNetDriver] NetConnectionClassName="OnlineSubsystemSteam.SteamNetConnection" ``` > Game.Build.cs ```auto using UnrealBuildTool; public class Game: ModuleRules { public Game(ReadOnlyTargetRules Target) : base(Target) { PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs; PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "AdvancedSessions", "AdvancedSteamSessions" }); PrivateDependencyModuleNames.AddRange(new string[] { "OnlineSubsystem", "OnlineSubsystemSteam" }); } } ``` ---
**Author:** ![Raveelll](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Raveelll](https://forums.unrealengine.com/u/Raveelll)\ **Post date:** [June 29, 2025, 1:45pm UTC](https://forums.unrealengine.com/t/advanced-sessions-plugin-unable-to-join-sessions-ue5/2582125/2 "2025-06-29T13:45:56Z")
Have the same issue. Tried everything with the same result. Also created a new clean project only with Advanced Sessions Plugin on UE 5.6 to make sure that there is nothing wrong with my existing project and joining session process is exactly the same. ---
**Author:** ![b1gdaddybear](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/b1gdaddybear/32/1210284_2.png) [@b1gdaddybear](https://forums.unrealengine.com/u/b1gdaddybear)\ **Post date:** [July 1, 2025, 2:38am UTC](https://forums.unrealengine.com/t/advanced-sessions-plugin-unable-to-join-sessions-ue5/2582125/3 "2025-07-01T02:38:26Z")
I’m using 5.6 with my game and it’s working - including fixing the issue of ping(ms)which is now working. You need to put the Steam\_Appid.txt in the packaged directory of /name of game/Binaries/Win64/… I also have these settings in my DefaultEngine.ini: [OnlineSubsystem] DefaultPlatformService=Steam bHasVoiceEnabled=true VoiceNotificationDelta=0.2 MaxLocalTalkers=1 MaxRemoteTalkers=16 PollingIntervalInMs=20 bUseBuildIdOverride=false BuildIdOverride=0 !AdditionalModulesToLoad=Clear +AdditionalModulesToLoad=HTTP +AdditionalModulesToLoad=XMPP [OnlineSubsystemSteam] bEnabled=true SteamDevAppId=2052340 bInitServerOnClient=true bUsesPresence=true bUseLobbiesIfAvailable=true bUseSteamNetworking=true bAllowP2PPacketRelay=true [/Script/OnlineSubsystemSteam.SteamNetDriver] NetConnectionClassName=“OnlineSubsystemSteam.SteamNetConnection” ---
**Author:** ![STRiFE.x](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/strife.x/32/969826_2.png) [@STRiFE.x](https://forums.unrealengine.com/u/STRiFE.x)\ **Post date:** [July 2, 2025, 6:31am UTC](https://forums.unrealengine.com/t/advanced-sessions-plugin-unable-to-join-sessions-ue5/2582125/4 "2025-07-02T06:31:25Z")
> [@Is there anyone who can run the Online Subsystem Steam properly in UE 5.6?](https://forums.unrealengine.com/t/is-there-anyone-who-can-run-the-online-subsystem-steam-properly-in-ue-5-6/2543935): > > Hi, I’m trying to migrate my project from UE 5.5.4 to UE 5.6. Everything has been going well so far, except for the Steam integration. The scenario is as follows; A hosting player runs the packaged game on a PC with Steam Account - A and creates a lobby session and successfully travels to lobby map via server travel. World-\>ServerTravel(PathToLobby); Another player (client) runs the same packaged game on another PC with Steam Account - B and tries to join host player A. PlayerController…