Component is not ready message

[gabor53]

Hi,
I'm trying to load busyIndicator from Qt Quick.
My qml file:

import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Window 2.2

ApplicationWindow {
    id: windowView
    width: 100
    height: 100
    visible: true

    modality: Qt.ApplicationModal
    color: "#00000000"
    flags: Qt.FramelessWindowHint | Qt.WA_TranslucentBackground

    BusyIndicator {
       id: busyIndication
       anchors.centerIn: parent
    }
}

main.cpp:

#include "busytest.h"
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlProperty>
#include <QQmlEngine>
#include <QQmlComponent>
#include <QFile>
#include <QObject>
#include <QQuickView>

int main(int argc, char* argv[]) {
  QGuiApplication app(argc, argv);

//  QQmlApplicationEngine engine;
//  engine.load(QUrl(QStringLiteral("qrc:/busy/main.qml")));
//  if (engine.rootObjects().isEmpty())
//    return -1;

  QQmlEngine engine;
  QQmlComponent component(&engine, QUrl::fromLocalFile ("qrc:/busy/main.qml"));
  QObject* object = component.create ();

  delete object;
  return app.exec();
}

I get no error message when I build the project, but when I run it it always says QQmlComponent: Component is not ready and nothing happens. The section commented out in main.cpp works fine. What is wrong with the second version?
Thank you for your help.