Online users gadget

The gadget is not finished. I have some questions that I will ask in the code.
The gadget doesn't show at all when added in Graasp. It is as if angular was not loaded. But when using the inspector, it looks like angular is actually loaded.

And if not within a xml gadget module, the gadget works when loaded as an html page (onlineUsers.html)

Any idea of what I should do to make it work?