Can not load query builder view

Hello Webix team,

I am using webix 6.1 PRO version.

This is my code for query quilder :

{
        view: "icon", icon: "mdi mdi-filter",tooltip:"Apply Filter", label: "Filter", popup: {
            view: "popup",
            id: "filter_popup",
            scrollX: true,
            head: false,
            body: {
                margin: 10,
                rows: [
                    {
                        view: "querybuilder",
                        id: "querybuilder",
                        fields:query_filter_fields,
                        maxLevel: 3
                    },
                    {
                        cols: [
                            {
                                view: "button",
                                value: "Apply Filter",
                                autowidth: true,
                                click: function () {
                                    // console.log("\
\
Value:: "+JSON.stringify($$("querybuilder").getValue()));
                                }
                            },
                            {
                                view: "button",
                                value: "Cancel",
                                autowidth: true,
                                click: function () {
                                    // $$(object+"_filter_popup").hide();
                                }
                            }
                        ]
                    }
                ]
            }
        }
    }

While using querybuilder view, I am getting blank page and the following error is displayed in console.

Uncaught TypeError: Ht[i] is not a constructor
at Function.Pt [as rt] (VM3447 webix.min.js:9)
at u.Sl (VM3447 webix.min.js:9)
at u.Sl (VM3447 webix.min.js:9)
at new u (VM3447 webix.min.js:9)
at Function.Pt [as rt] (VM3447 webix.min.js:9)
at u.body_setter (VM3447 webix.min.js:9)
at u.Qs (VM3447 webix.min.js:9)
at u.Zs (VM3447 webix.min.js:9)
at u.ot (VM3447 webix.min.js:9)
at new u (VM3447 webix.min.js:9)

Can you please tell me what is the cause ?

Got the problem. We need to include querybuilder.css and querybuilder.js in the index.html file.

I have included the querybuilder.css and querybuilder.js files but am still receiving this error. Any ideas?

Hello,

Please check again of how you connected the .js and .css files of querybuilder.
Usually, the error Ht[i] is not a constructorsays that the view doesn’t exist.
This code works as well: https://snippet.webix.com/khytj4qd