Finally got this working in the Sage Demo Image environment. Seems to work better in IE/Edge than Chrome. There are a few popups that you need to allow when it runs the first time with a good login. Once those are accepted, seems to work well.
Honestly, so far, I'm happy with how much you can manage in the Web Viewer. I was expecting it to be more of a limited environment, but that's not the case. Very surprised... for once in a good way.