OverviewFelgo 2 Support (Qt 5) › Multiplayer: Name server authentification failed – invalid application id

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  • #23471


    I’m new to Felgo and am trying to get acquaintance to the concepts of multiplayer game with a very simple example:

    The example I made (copied) is only to register to the FelgoGameNetwork and select one player to play with. The Main.qml has only a few code lines (s. code)

    import Felgo 3.0
    import QtQuick 2.0
    GameWindow {
        id: gameWindow
        FelgoGameNetwork {
            id: gameNetwork
            // created in the Felgo Web Dashboard
            gameId: 903
            secret: "3f8ec993-329a-4f7e-949f-e71eca1a1bbd"
            multiplayerItem: myMultiplayer
          FelgoMultiplayer {
            id: myMultiplayer
            appKey: "063B31DE67EA5E8.."
            gameNetworkItem: gameNetwork
            multiplayerView: myMultiplayerView
            playerCount: 2
        activeScene: scene
        screenWidth: 960
        screenHeight: 640
        Scene {
            id: scene
            width: 480
            height: 320
            SimpleButton {
               text: "Start Game"
               anchors.centerIn: parent
               onClicked: myMultiplayer.showMatchmaking()
               id: myMultiplayerView
               visible: false
               onShowCalled: myMultiplayerView.visible = true
               onBackClicked: myMultiplayerView.visible = false


    I defined an app and generate the app key. This can be compiled without any error. But if I click on “Start Game”, and click “create a game”, it shows “connecting..” and seems never to get connected. In the console I see this error:


    NameServer: Connected

    : State: ConnectingToNameServer -> ConnectedToNameServer

    NameServer: Authenticate…; State: ConnectedServer -> : 

    Error: 3101 NameServer authentication failed: 32767 Invalid application id


    It seems to me that the FelgoGameNetwork can not find my game defined in my profile. But I’ve given my gameid, appkey in .pro-File, config.json according to the documentation?!


    Thank you in advance for any help.



    Felgo Team


    can you send me the link to the example where you copied they appKey from?


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