Displaying marker on the Google Maps in Ember.js

I need your help in fixing the problem and understanding what the error is and how to fix it. I am trying to display the google map with help of Google Maps API in Ember.js but getting this error below please take a look and help.

Error while processing route: search google.maps.Attribution is not a constructor TypeError: google.maps.Attribution is not a constructor
    at Class.setupController (http://localhost:4200/assets/places-finder-app.js:1151:26)
    at Class.setup (http://localhost:4200/assets/vendor.js:42767:12)
    at callHook (http://localhost:4200/assets/vendor.js:61048:38)
    at _handlerEnteredOrUpdated (http://localhost:4200/assets/vendor.js:62643:7)
    at handlerEnteredOrUpdated (http://localhost:4200/assets/vendor.js:62655:7)
    at setupContexts (http://localhost:4200/assets/vendor.js:62610:9)
    at finalizeTransition (http://localhost:4200/assets/vendor.js:62819:7)
    at http://localhost:4200/assets/vendor.js:62217:14
    at tryCatch (http://localhost:4200/assets/vendor.js:63470:14)
    at invokeCallback (http://localhost:4200/assets/vendor.js:63485:15)

ember.debug.js:26513 TypeError: google.maps.Attribution is not a constructor
    at Class.setupController (search.js:14)
    at Class.setup (ember.debug.js:32172)
    at callHook (ember.debug.js:50453)
    at _handlerEnteredOrUpdated (ember.debug.js:52048)
    at handlerEnteredOrUpdated (ember.debug.js:52060)
    at setupContexts (ember.debug.js:52015)
    at finalizeTransition (ember.debug.js:52224)
    at ember.debug.js:51622
    at tryCatch (ember.debug.js:52875)
    at invokeCallback (ember.debug.js:52890)

Here is the file where I am getting error from at Attribution and markerPlace. app/routes/search.js

 export default Ember.Route.extend({
      setupController: function(controller) {
        controller.setProperties({
          selections: {
            markerOptions: {
              animation: google.maps.Animation.DROP,
              anchorPoint: new google.maps.Point(),
              attribution: new google.maps.Attribution(),
              icon: 'beachflag-8f33bab9b0c154462489b35140f29fae.png',
              label: 'A',
              optimized: true,
              place: new google.maps.MarkerPlace(),
              position: new google.maps.LatLng(),
              shape: new google.maps.MarkerShape(),
              title: 'string',
              zIndex: 999
            }
          }
        });
      }
    });