QPrinter: No such file or directory

When I tried to use Qtilities with Qt application I got this error message:

QPrinter: No such file or directory

This my .pro file

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = GUI
TEMPLATE = app

SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

QTILITIES += coregui
QTILITIES += extension_system
QTILITIES_BASE = ../../Qtilities
include($$QTILITIES_BASE/src/Qtilities.pri)

My main.cpp file

#include "mainwindow.h"
#include <QApplication>

#include <QtilitiesExtensionSystem>
using namespace QtilitiesCore;
using namespace QtilitiesCoreGui;
using namespace QtilitiesExtensionSystem;

int main(int argc, char *argv[])
{
    //    QApplication a(argc, argv);

    QtilitiesApplication a(argc, argv);
    // We must specify the following if we want the logger to remember its settings:
    QtilitiesApplication::setOrganizationName("Jaco Naudé");
    QtilitiesApplication::setOrganizationDomain("Qtilities");
    QtilitiesApplication::setApplicationName("Extension System Example");
    QtilitiesApplication::setApplicationVersion("0.1");
    // Initialize the logger:
    QtilitiesApplication::applicationSessionPath();
    LOG_INITIALIZE();
    // Set the Qt message engine active, this will log messages to the Qt debugging system during the plugin loading process:
    Log->toggleQtMsgEngine(true);
    // Load plugins using the extension system:
    EXTENSION_SYSTEM->initialize();
    // Set the Qt message engine inactive once the process loading process is completed:
    Log->toggleQtMsgEngine(false);
    // Register extension system config page:
    OBJECT_MANAGER->registerObject(EXTENSION_SYSTEM->configWidget());
    // Report on the number of config pages found:
    QList<QObject*> registered_config_pages = OBJECT_MANAGER->registeredInterfaces("com.Qtilities.CoreGui.IConfigPage/1.0");
    LOG_INFO(QString("%1 configuration page(s) found in set of loaded plugins.").arg(registered_config_pages.count()));
    // Create a config widget for this example:
    ConfigurationWidget config_widget;
    config_widget.initialize(registered_config_pages);

    MainWindow w;
    w.show();
    //    exampleMainWindow->show();
    int result = a.exec();
    // Finalize all plugins:
    EXTENSION_SYSTEM->finalize();
    // Finalize the logger:
    LOG_FINALIZE();

    return result;
}

JPNaude / Qtilities

QPrinter: No such file or directory #95