Error while processing route: equipment data is null

Im grabbing json data from a DRF API with ember-data. But the problem is, that ember returns "Error while processing route: equipment data is null" after requesting the data from the api. When i inspect the response with firebug everything seems ok.

equipment.js (models):

import DS from 'ember-data';

export default DS.Model.extend({
    Name: DS.attr('string'), 
    labor: DS.attr('string'), 
    storeplace: DS.attr('integer'), 
    fabricator: DS.attr('choice')
}); 

adapter:

import DS from 'ember-data';
import ENV from 'application/config/environment';

export default DS.JSONAPIAdapter.extend({
  host: ENV.host, 
  namespace: 'api'
}); 

enviroment.js:

import DS from 'ember-data';
import ENV from 'application/config/environment';

export default DS.JSONAPIAdapter.extend({
  host: ENV.host, 
  namespace: 'api'
}); 

route:

import Ember from 'ember';

export default Ember.Route.extend({ 
    model() {
    return this.store.findAll('equipments'); 
    }
});

if i have forgotten some code you need please comment. thanks in advance