Select OnChange Error

controllers.application.js

import Ember from 'ember';

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

models.MultipleItems.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';
import SimpleItem from '../models/SimpleItem';

/**
* Model to simulate an AJAX CALL To retrieve all items
*
**/
export default Model.extend({
  
  	items: [],
    isReady: false,
  
		init(){
           
      
      this.set('items', []);
      this.set('isReady', false);
      
      
    }, 
  
  
  	SetData(){
      
       let promise = new Promise((resolve, reject) => {

					setTimeout(() => {
         
         		this.get('items').pushObject(SimpleItem.create({name: 'itemOne'}));
         		this.get('items').pushObject(SimpleItem.create({name: 'itemTwo'}));
         		this.get('items').pushObject(SimpleItem.create({name: 'itemThree'}));
            this.set('isReady', true);
            resolve();
         	
          }, 3000);

       });
      
      
      return promise;
      
    }
  
});

models.SimpleItem.js

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

export default Model.extend({
  
  	price: null,
    name: null,
  
  	init(){
     
      this.set('price', null);
      this.set('name', null);
      
    }
  
});

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

const Router = EmberRouter.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('myRoute');
});

export default Router;

routes.my-route.js

import Ember from 'ember';
import MultipleItems from '../models/MultipleItems';

export default Ember.Route.extend({
  
  	model(){
  
      let model = MultipleItems.create();      
      model.SetData();
      return model;
      
    },
  
  
  	actions: {
     
     ComboChangeCaseOne(passItem, propertyToChange, selectedValue){
      
        console.info(passItem, propertyToChange, selectedValue);
       
     },
     
     
     ComboChangeCaseTwo(passItem, propertyToChange, selectedValue, fullEvent){
      
       console.info(passItem, propertyToChange, selectedValue, fullEvent);
       
     }
     
   }
    
  
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#link-to 'myRoute'}}Go To Demo{{/link-to}}
{{outlet}}
<br>
<br>

templates.my-route.hbs

{{#if model.isReady}}

<h1>Selected Event Case One</h1>

{{#each model.items as |newItem|}}

<h3>{{newItem.name}}</h3>
<select onChange={{action 'ComboChangeCaseOne' newItem 'price' value='target.value'}}>
     <option value="">Select an option</option>
     <option value="1000">$1000</option>
     <option value="100">$100</option>
     <option value="10">$10</option>  
</select>

{{/each}}


<h1>Selected Event Case Two</h1>

{{#each model.items as |newItem|}}

<h3>{{newItem.name}}</h3>
<select {{action 'ComboChangeCaseTwo' newItem 'price' value='target.value' on='change'}}>
     <option value="">Select an option</option>
     <option value="1000">$1000</option>
     <option value="100">$100</option>
     <option value="10">$10</option>  
</select>

{{/each}}

{{else}}

<h1>Loading....</h1>

{{/if}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}