Ajax Promise on Property not returning data

I have an Ember controller with a simple property that should get a list of files from the server. Server-Side all good, data is returning and showing on console.

In controller I have:

imgFiles: new Ember.RSVP.Promise(function(resolve, reject) {
                Ember.$.ajax(ENV.apiHost+'/'+ENV.apiNamespace +'/folderwalk/newsimg', {
                    success: function(response) {
                        // console.log(response);
                        resolve(response);

                    },
                    error: function(reason) {
                        reject(reason);

                    }
                });
            }),

In template:

  // shows [object Object]
   // doesn't loop at all
        x 

I've tried all variations I could think of. Encapsulate in function and return the Promise, return response on success,...
Still I can not get the promise to return the actual data.