virtualKeyboard not sending events to qt application in Embedded Linux i.MX6 platform

[T_Eng]

I am trying to use githubuser0xFFFF's virtual keyboard with Qt5.5 on embedded linux system: https://github.com/githubuser0xFFFF/QtFreeVirtualKeyboard

When the virtual keyboard runs QGuiApplication::focusObject() it crashes my qt program with "QCoreApplication::sendEvent: Unexpected null receiver"

void DeclarativeInputEngine::sendKeyToFocusItem(const QString& text)
{
    qDebug() << "CDeclarativeInputEngine::sendKeyToFocusItem " << text;
    QInputMethodEvent ev;
    if (text == QString("\x7F"))
    {
        //delete one char
        ev.setCommitString("",-1,1);

    } else
    {
        //add some text
        ev.setCommitString(text);
    }
    QCoreApplication::sendEvent(QGuiApplication::focusObject(),&ev);
}

How do I correctly connect my virtual keyboard declarative engine to my qt program in an embedded environment? Because the virtual keyboard works as expected on Ubuntu 14.04 development environment.

Thanks!

[T_Eng]

@T_Eng Also to say that my GUI is Qt Quick Qml code and I am trying to fill a TextField qml type