How to create links

Hi guys. Returning player trying to sort out communities. I have seen links to communities generated in our raid chat. I created my own achievement group, and can invite people individually, but whenever I go to any of my communities and try to generate a link, all the buttons are grayed out. Any advice? I am owner or leader of every group I have been invited to, but no links.

I had this issue once upon a time actually, it seemed to be a UI error. If you use anything other than stock, try turning off one addon at a time (I think for me it was an outdated version of ElvUI that was doing it).