ember.js Ember.Select throws error "Cannot read property 'selectedIndex' of undefined" -

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Then, I have this code: 

  {{# if ifclient}} { {See Amber. Choose value = country content = options.country prompt = 'please select country'}} {{/ if}}   
 which works great on load because  isClient  Default to true, however, when I set the  isCLient  false, I get this error:  
  Mandatory   
 Property 'selectedIndex' can not be read Anyone with better understanding of the underlying code has any ideas?   
 
 
 OK, so I found out the problem was.  
 I was using Amber-Animate Library and calling:  
  Ember.View.reopen ({willAnimateIn: function () {this. $ (). ( );}, Anime in: function (done) {this. $ (). FadeIn (250, done);}, animate out function (done) {this. $ (). FadeOut (250, done); },});  from Amber Selection is a scene, animation features were being called when it was visible and disappeared. Therefore, I have changed it from the top:  
  Amber Animatedview = amber View. Extension ({  
 And all is well.

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