Properly initialize WebEngineView

S0ulM1ke

I've decided to add YouTube video playback feature in my app (in QML), so I choose WebEngineView

As I watched the documentation I do this in main.cpp :

    QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts);
    QtWebEngineQuick::initialize();

Before initializing QCoreApplication.

And in my view i use this:

import QtWebEngine 1.10
...
                        WebEngineView {
                            width: 600
                            height: 300
                            Component.onCompleted: {
                                url = model.gameVideoUrl
                            }
                        }
...

This works but I have this message in output (happens when item initializes):

QWebEngineFileSystemAccessRequest is neither a QObject, nor default- and copy-constructible. You should not use it as a QML type.
QWebEngineCertificateError is neither a QObject, nor default- and copy-constructible. You should not use it as a QML type.
QWebEngineFullScreenRequest is neither a QObject, nor default- and copy-constructible. You should not use it as a QML type.
QWebEngineLoadingInfo is neither a QObject, nor default- and copy-constructible. You should not use it as a QML type.

What am I doing wrong?