Yeah, so that only exists in master, not `0.4`. The default loading for `0.4` is still done by including `vnc.js`, which allowed me to get `0.4` working in GWM. I'm working on a few other issues (like not having routes for noVNC after an update in develop earlier this summer), along with this, but you should see develop with noVNC 0.4 included in the next week or so.