Нативная сборка Sencha touch 2 не загружается

После создания приложения по умолчанию с:

sencha generate app Sencha../Sencha

Я решил протестировать приложение на симуляторе iOS

cd../Sencha/
sencha app build native

. Приложение загружается, но зависает на значке загрузки :

. Ниже приведен код основного приложения (App.js):

Ext.application({
    name: 'Sencha',

    requires: [
        'Ext.MessageBox'
    ],

    views: ['Main'],

    icon: {
        '57': 'resources/icons/Icon.png',
        '72': 'resources/icons/Icon~ipad.png',
        '114': 'resources/icons/Icon@2x.png',
        '144': 'resources/icons/Icon~ipad@2x.png'
    },

    isIconPrecomposed: true,

    startupImage: {
        '320x460': 'resources/startup/320x460.jpg',
        '640x920': 'resources/startup/640x920.png',
        '768x1004': 'resources/startup/768x1004.png',
        '748x1024': 'resources/startup/748x1024.png',
        '1536x2008': 'resources/startup/1536x2008.png',
        '1496x2048': 'resources/startup/1496x2048.png'
    },

    launch: function() {
        // Destroy the #appLoadingIndicator element
        Ext.fly('appLoadingIndicator').destroy();

        // Initialize the main view
        Ext.Viewport.add(Ext.create('Sencha.view.Main'));
    },

    onUpdated: function() {
        Ext.Msg.confirm(
            "Application Update",
            "This application has just successfully been updated to the latest version. Reload now?",
            function(buttonId) {
                if (buttonId === 'yes') {
                    window.location.reload();
                }
            }
        );
    }
});

Ниже приведен код основного представления (Main.js):

Ext.define("Sencha.view.Main", {
    extend: 'Ext.tab.Panel',
    requires: [
        'Ext.TitleBar',
        'Ext.Video'
    ],
    config: {
        tabBarPosition: 'bottom',

        items: [
            {
                title: 'Welcome',
                iconCls: 'home',

                styleHtmlContent: true,
                scrollable: true,

                items: {
                    docked: 'top',
                    xtype: 'titlebar',
                    title: 'Welcome to Sencha Touch 2'
                },

                html: [
                    "You've just generated a new Sencha Touch 2 project. What you're looking at right now is the ",
                    "contents of <a target='_blank' href=\"app/view/Main.js\">app/view/Main.js</a> - edit that file ",
                    "and refresh to change what's rendered here."
                ].join("")
            },
            {
                title: 'Get Started',
                iconCls: 'action',

                items: [
                    {
                        docked: 'top',
                        xtype: 'titlebar',
                        title: 'Getting Started'
                    },
                    {
                        xtype: 'video',
                        url: 'http://av.vimeo.com/64284/137/87347327.mp4?token=1330978144_f9b698fea38cd408d52a2393240c896c',
                        posterUrl: 'http://b.vimeocdn.com/ts/261/062/261062119_640.jpg'
                    }
                ]
            }
        ]
    }
});