How to call Dialog with openfunction properly?

[OpenCoder]

I am trying to call a dialog with open function, but I've got an error message: "Property 'open' of object C2opedi_TestComponent_QMLTYPE_48(0x141907af3f0) is not a function".
Do you have any idea how to solve it? Thanks.

import QtQuick 2.12
import QtQuick.Controls 2.12
import QtQuick.Dialogs 1.2
import QtQuick.Layouts 1.12
import "qrc:/qml/public"
import "../public"

Item
{
    id: root
    implicitWidth: 300
    implicitHeight: 100
    SystemPalette { id: palette }
    clip: true

    property string confirmationDialogMessage: "Do you confirm?"
    property string buttonGroupTextYes: "Yes"
    property string buttonGroupTextNo: "No"



    Rectangle
    {
        id: bottomBar
        anchors
        {
            left: parent.left
            right: parent.right
            bottom: parent.bottom
        }
        height: confirmationDialogButton.height * 1.2
        color: Qt.darker(palette.window, 1.1)
        border.color: Qt.darker(palette.window, 1.3)
        Row
        {
            id: confirmationDialogButton
            spacing: 6
            anchors.verticalCenter: parent.verticalCenter
            anchors.left: parent.left
            anchors.leftMargin: 12
            width: parent.width
            Button
            {
                text: "Confirmation dialog"
                anchors.verticalCenter: parent.verticalCenter
                onClicked: confirmationDialog.open()
            }
        }
    }
    C2opedi_TestComponent
    {
        id: confirmationDialog
        confirmationMessage: confirmationDialogMessage
        buttonTextYes: buttonGroupTextYes
        buttonTextNo: buttonGroupTextNo

    }

}