When I look at jupyter nbextension list in my native Jupyter notebook, I see that arcgis/mapview is enabled, and I am able to view the maps. However, when I try to open my notebook from a myBinder copy, I cannot view maps and when I look at jupyter nbextension list, there is no mention of arcgis/mapview. In the Chrome console I see errors like "Could not instantiate widget." What's going on? Does it have to do with setting the MapView.set_js_cdn?
Thank you so much!