Found out something interesting today while working on one of our themes for Hubzilla. The notification widget won't work unless you have a button with a specific class.... which our theme does not use. I created a temporary workaround by adding a button with the relevant classes so the JavaScript won't fail.
If you are making a custrom Hubzilla theme, you may have to modify your theme to use the notification-btn class to get notifications to work.
Just leaving this as a note for myself (or anyone else interested).
