Unexpected GSPolicyResponse callback ue5 dedicated steam server

Hello,

i am trying to make a dedicated steam server for my Game.
I am using to Advanced Session and Advanced Steam Session plugin.
I am using UE5.6 from source Build
For now I am using AppID=480

Everytime I start the dedicated Server I got the Errors shown in the server log.
Does someone have the same Problem?

I already tried with SteamSockets and without, no difference…
I need help.

Thanks -

OnlineSessionAsyncServerSteam.cpp

#ifndef UE_PROJECT_STEAMPRODUCTNAME
#define UE_PROJECT_STEAMPRODUCTNAME "spacewar"
#endif //UE_PROJECT_STEAMPRODUCTNAME

#ifndef UE_PROJECT_STEAMGAMEDIR
#define UE_PROJECT_STEAMGAMEDIR "spacewar"
#endif // UE_PROJECT_STEAMGAMEDIR

#ifndef UE_PROJECT_STEAMGAMEDESC
#define UE_PROJECT_STEAMGAMEDESC "Spacewar"
#endif // UE_PROJECT_STEAMGAMEDESC

Server.Target.cs

using UnrealBuildTool;
using System.Collections.Generic;

public class Extraction_ShooterServerTarget : TargetRules
{
    public Extraction_ShooterServerTarget(TargetInfo Target) : base(Target)
    {
        Type = TargetType.Server;
        DefaultBuildSettings = BuildSettingsVersion.V5;
        IncludeOrderVersion = EngineIncludeOrderVersion.Unreal5_6;
        ExtraModuleNames.Add("Extraction_Shooter");

        GlobalDefinitions.Add("UE_PROJECT_STEAMSHIPPINGID=480");
        GlobalDefinitions.Add("UE_PROJECT_STEAMPRODUCTNAME=\"spacewar\"");
        GlobalDefinitions.Add("UE_PROJECT_STEAMGAMEDIR=\"spacewar\"");
        GlobalDefinitions.Add("UE_PROJECT_STEAMGAMEDESC=\"Spacewar\"");
        GlobalDefinitions.Add("UE_SERVER_USE_PRESENCE=0");
    }
}

DefaultEngine.ini

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

[OnlineSubsystem]
DefaultPlatformService=Steam

[OnlineSubsystemSteam]
bEnabled=True
SteamDevAppId=480
SteamAppId=480
bUseSteamNetworking=false

[/Script/SteamSockets.SteamSocketsNetDriver]
NetConnectionClassName="/Script/SteamSockets.SteamSocketsNetConnection"

[PacketHandlerComponents]
+Components=OnlineSubsystemSteam.SteamAuthComponentModuleInterface

Server Output Log:

LogSteamShared: Display: Loading Steam SDK 1.57
LogSteamShared: Steam SDK Loaded!
Setting breakpad minidump AppID = 480
LogOnline: STEAM: [AppId: 480] Game Server API initialized 1
LogOnline: STEAM: AUTH: Steam Auth Enabled
LogOnline: OSS: Created online subsystem instance for: STEAM
LogOnline: OSS: TryLoadSubsystemAndSetDefault: Loaded subsystem for type [STEAM]
LogConfig: Applying CVar settings from Section [/Script/CompositeCore.CompositeCorePluginSettings] File [Engine]
...
[2025.10.07-17.22.59:408][  0]LogWorldPartition: Display: WorldPartition initialize started...
[2025.10.07-17.22.59:408][  0]LogWorldPartition: UWorldPartition::Initialize : World = /Game/level/MapMaster/MapMaster.MapMaster, World Type = Game, IsMainWorldPartition = 1, Location = V(0), Rotation = R(0), IsEditor = 0, IsGame = 0, IsPIEWorldTravel = 0, IsCooking = 0
[2025.10.07-17.22.59:408][  0]LogWorldPartition: UWorldPartition::Initialize Context : World NetMode = Dedicated Server, IsServer = 1, IsDedicatedServer = 1, IsServerStreamingEnabled = 0, IsServerStreamingOutEnabled = 0, IsUsingMakingVisibleTransaction = 0, IsUsingMakingInvisibleTransaction = 0
[2025.10.07-17.22.59:408][  0]LogWorldPartition: Display: WorldPartition initialize took 322 us
[2025.10.07-17.22.59:412][  0]LogLoad: Game class is 'GM_GameMode_C'
[2025.10.07-17.22.59:412][  0]LogCsvProfiler: Display: Metadata set : iris="0"
[2025.10.07-17.22.59:412][  0]LogNet: ReplicationDriverClass is null! Not using ReplicationDriver.
[2025.10.07-17.22.59:412][  0]LogNetCore: DDoS detection status: detection enabled: 0 analytics enabled: 0
[2025.10.07-17.22.59:412][  0]LogNet: InitBase GameNetDriver (NetDriverDefinition GameNetDriver) using replication model Generic
[2025.10.07-17.22.59:413][  0]PacketHandlerLog: Loaded PacketHandler component: Engine.EngineHandlerComponentFactory (StatelessConnectHandlerComponent)
[2025.10.07-17.22.59:413][  0]LogNet: Name:GameNetDriver Def:GameNetDriver SteamSocketsNetDriver_2147482478 started listening on 7777
[2025.10.07-17.22.59:413][  0]LogWorld: Bringing World /Game/level/MapMaster/MapMaster.MapMaster up for play (max tick rate 30) at 2025.10.07-19.22.59
[2025.10.07-17.22.59:413][  0]LogWorld: Bringing up level for play took: 0.000270
[2025.10.07-17.22.59:416][  0]LogLoad: Took 0.021529 seconds to LoadMap(/Game/level/MapMaster/MapMaster)
[2025.10.07-17.22.59:416][  0]LogGlobalStatus: UEngine::LoadMap Load map complete /Game/level/MapMaster/MapMaster
[2025.10.07-17.22.59:419][  0]LogInit: Display: Engine is initialized. Leaving FEngineLoop::Init()
[2025.10.07-17.22.59:419][  0]LogLoad: (Engine Initialization) Total time: 2.30 seconds
[2025.10.07-17.22.59:453][  0]LogLiveCoding: Display: Successfully initialized, removing startup thread
[2025.10.07-17.22.59:453][  0]LogTrace: Display: Control listening on port 34350
[2025.10.07-17.22.59:519][  3]LogSteamSocketsAPI: Warning: SteamSockets API: Warning SDR network config fetch attempt #1 failed.  HTTP 504.  .  Trying again.
[2025.10.07-17.22.59:553][  4]LogSteamSocketsAPI: Verbose: SteamSockets API: Log Got SDR network config.  Loaded revision 1757966882 OK
[2025.10.07-17.22.59:553][  4]LogSteamSocketsAPI: Verbose: SteamSockets API: Log Performing ping measurement
[2025.10.07-17.22.59:554][  4]LogSteamSocketsAPI: Verbose: SteamSockets API: Log SDR RelayNetworkStatus:  avail=Attempting  config=OK  anyrelay=Attempting   (Performing ping measurement)
[2025.10.07-17.23.03:176][114]LogSteamSocketsAPI: Verbose: SteamSockets API: Log Ping measurement completed in 3.5s.  Relays: 23 valid, 3 great, 10 good+, 15 ok+, 7 ignored
[2025.10.07-17.23.03:176][114]LogSteamSocketsAPI: Verbose: SteamSockets API: Log Ping location: ams=15+1,fra=15+1,ams4=24+2/16+1,lhr=25+2/20+1,par=23+2/24+1,vie=29+2/26+1,sto2=35+3/35+1,sto=40+4/35+1,waw=35+3/36+1,iad=110+11/101+1,gru=211+21/215+2,sgp=265+26/220+18
[2025.10.07-17.23.03:177][114]LogSteamSocketsAPI: Verbose: SteamSockets API: Log SDR RelayNetworkStatus:  avail=OK  config=OK  anyrelay=OK   (OK.  Relays: 23 valid, 3 great, 10 good+, 15 ok+, 7 ignored)
[2025.10.07-17.23.05:381][181]LogSteamSocketsAPI: Verbose: SteamSockets API: Log Gameserver logged on to Steam, assigned identity steamid:90275216748947457
[2025.10.07-17.23.05:382][181]LogSteamSocketsAPI: Verbose: SteamSockets API: Log AuthStatus (steamid:90275216748947457):  Attempting  (Requesting cert)
[2025.10.07-17.23.05:382][181]LogSteamSocketsAPI: Verbose: SteamSockets API: Log Set SteamNetworkingSockets P2P_STUN_ServerList to '155.133.248.38:3478' as per SteamNetworkingSocketsSerialized
[2025.10.07-17.23.05:648][189]LogSteamSocketsAPI: Verbose: SteamSockets API: Log AuthStatus (steamid:90275216748947457):  OK  (OK)
[2025.10.07-17.23.05:648][189]LogSteamSocketsAPI: Verbose: SteamSockets API: Log Certificate expires in 48h00m at 1760030585 (current time 1759857784), will renew in 46h00m

[2025.10.07-17.23.05:714][190]LogOnline: Warning: STEAM: Unexpected GSPolicyResponse callback
[2025.10.07-17.23.19:454][608]LogOnline: Warning: OSS: Async task 'FOnlineAsyncTaskSteamCreateServer bWasSuccessful: 0' failed in 15.001879 seconds
[2025.10.07-17.23.19:455][608]LogBlueprintUserMessages: [GI_Mutiplayer_Sessions_C_2147482567] Server Start Failed

I also encountered the same problem. I also tried using SteamSocket, but it didn’t improve