I took a quick look and it should still work — but it does depend on your group’s permissions. Someone needs to be able to view the group’s page to be able to see the group listed on the about page.
Trust Level 4 for example, defaults to only being visible to logged-in users. So you’d have to go to the group, then manage > interaction and change “who can see this group?” to Everyone for logged-out visitors to see it.
This is a limitation of how this component works, because it fetches the group page data. We’re planning on adding this functionality into Discourse by default, and at that point we might be able populate users here without also exposing the group page. Not sure how those details will work out yet.
