QML PieMenu creation error

I have following QML PieMenu, based on it's docs:

Code:

---

import QtQuick 2.10
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.3
import QtQuick.Extras 1.4
 
PieMenu
{
    signal ueSignalRFIDOperationInfo();
    signal ueSignalRFIDOperationPair();
    signal ueSignalRFIDOperationIgnore();
    signal usSignalRFIDOperationDelete();
 
    MenuItem
    {
        text: qsTr("Info")
 
        onTriggered:
        {
            ueSignalRFIDOperationInfo();
        }   // onTriggered
    }   // MenuItem
 
    MenuItem
    {
        text: qsTr("Pair")
 
        onTriggered:
        {
            ueSignalRFIDOperationPair();
        }   // onTriggered
    }   // MenuItem
 
    MenuItem
    {
        text: qsTr("Ignore")
 
        onTriggered:
        {
            ueSignalRFIDOperationIgnore();
        }   // onTriggered
    }   // MenuItem
 
    MenuItem
    {
        text: qsTr("Delete")
 
        onTriggered:
        {
            usSignalRFIDOperationDelete();
        }   // onTriggered
    }   // MenuItem
}   // PieMenu

---

Because of it, my app crashes:

Quote:

---

W/libRFIDMonitorApp.so(17663): (null):0 ((null)): QQmlApplicationEngine failed to load component
W/libRFIDMonitorApp.so(17663): (null):0 ((null)): qrc:/main.qml:69 Type UeQMLDelegates.UeDelegateBtDiscoveredDevices unavailable
W/libRFIDMonitorApp.so(17663): qrc:/gui/elements/delegates/UeDelegateBtDiscoveredDevices.qml:122 Type UeQMLElements.UeRFIDOperationMenu unavailable
W/libRFIDMonitorApp.so(17663): qrc:/gui/elements/UeRFIDOperationMenu.qml:13 Cannot assign object to list property "menuItems"

---

Now, if I exclude this menu from app, the app works. I've built the PieMenu according to docs, so, what am I missing? I am using Qt 5.10 Opensource on ArchLinux, deploying app to Android 4.2.2.

I've managed to solve the problem. I've included:

Code:

---

import QtQuick.Controls 2.3

---

instead of

Code:

---

import QtQuick.Controls 1.4

---

It works now, however, can someone explain me these import "versions". Why higher version does not support MenuItem and lower does?