After installing and activating the User Mentioning plugin I can only get it to work properly if I mention a user by their User ID. Using the "search" button and selecting a user that way simply does not work. It does not fire an email nor does it properly hyperlink the mentioned users' name with the fancy pop-up.
TL;DR
Nothing works if I use the @username or use the little search person button. Everything works fine if I use the User ID directly (@117).
Any ideas? Just bought this plugin and really need it to work!
Lastly - noticed that users with a single username (jpollock) work but users with hyphens don't (rigo-zevada-ce-cen )
Screenshots attached