I'm having problems printing out tiled services in WAB, I'm caching and hosting the services in ArcGis for Server and then consuming them in a WAB app, for now, I'm not using the developer version of the WAB, but I will. As you can see in the example below, it should show three layers in the legend, but the tiled services don't appear. Any idea why? can it be related to the security of my server? or perhaps the setting of the cached services?