Trying to run qmlscene but getting the following error

puneethchanda

I created a qml file containing

import QtQuick 2.12

Rectangle {
    width: 200
    height: 100
    color: "red"
    Text {
        anchors.centerIn: parent
        text: "Hello World"
    
    }
    TapHandler{
        onTapped: parent.color = "blue"
    }
}

but I am getting the following error.
qmlscene: could not find a Qt installation of ""
my Qt is installed at
/home/puneethchanda/Documents/Qt/
can anyone please help me how to solve this.