Ember Cli ajaxError in ActiveModel Serializer

Ember CLI
1

this is my Error

POST http://localhost/saleserp/api/locations.json 501 (Not Implemented) vendor.js:9726
true embersite/adapters/application.js:73
success embersite/controllers/lo

this is my code

ajaxError: function(jqXHR) {

        var error = this._super(jqXHR);
        console.log(jqXHR && jqXHR.status === 501);

        if (jqXHR && jqXHR.status === 501) {

        var response = Ember.$.parseJSON(jqXHR.responseText),
            errors = {};

        if (response.errors !== undefined) {
            var jsonErrors = response.errors;

            forEach(Ember.keys(jsonErrors), function(key) {

                errors[Ember.String.camelize(key)] = jsonErrors[key];
            });
        }

        return new DS.InvalidError(errors);
    } else {
        return error;
    }
},

var get = Ember.get, forEach = Ember.EnumerableUtils.forEach;