I am trying to customize one of the ESRI story map pages, and I am encountering a javascript error that is confounding me. I want to use a MapImageLayer to display a picture on top of the map, but the image doesn't show up. The sample can be found here (ignore the lack of captions)http://geographyis.com/MapStories/mapStory/index.htmlThe code to add the layer is below, when it runs I get a javascript error in the MapImageLayer.js file (line 19): TypeError: _25 is nullHas anyone successfully implemented this? Any suggestions? Anything?_map = new esri.Map("map"); _map.addLayer(new esri.layers.ArcGISTiledMapServiceLayer(BASEMAP_URL)); var mil = new esri.layers.MapImageLayer({ 'id': 'mtAlbertMap' }); var mi = createMapImage(); _map.addLayer(mil); mil.addImage(mi); ... function createMapImage() { var mi = new esri.layers.MapImage({ 'extent': { 'xmin': -13963916, 'ymin': 6386341, 'xmax': -13942805, 'ymax': 6405759, 'spatialReference': { 'wkid': 3857 } }, 'href': "http://geographyis.com/MapStories/mapStory/images/Mount_Albert_Edward_Trail.jpg" }); return(mi); }