Ember fragment issue

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Dusan'
  
});

models.my-model-fragment.js

import Model from "ember-data/model";
import MF from 'ember-data-model-fragments';
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default MF.Fragment.extend({
  fragmentName: attr("string", {defaultValue: ""}),
});

models.my-model.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";
//import { fragmentArray } from 'ember-data-model-fragments/attributes';
//import MF from 'ember-data-model-fragments';

export default Model.extend({
    //name: attr("string", {defaultValue: ""}),
    //fragmentList: fragmentArray("my-model-fragment"),
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  setupController(controller, model) {
    this._super(controller, model);
  	
    let myModel = this.store.createRecord("my-model");
    
    controller.set("my-model", myModel);
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0",
		"ds-mf-twiddle-test": "0.0.3"
  },
  "addons": {
    "ember-data": "2.12.1",
		"ds-mf-twiddle-test": "0.0.3"
  }
}