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I have what I think is an issue with the display of my groups. I have the menu item set to display "All Groups" (however in Joomla 3.24 it shows in the Menu Item Type * as create group)
it's hard to describe so best way is to provide a link so as you can see for yourself how the page appears.
Please check it, I made the fixes for you. The problem is I found deleted group (group with ID 2) as featured items.
I delete manually that deleted group from table community_featured.
I'm not sure this is a valid bug. because I can't replicate it at my end. But let me know if this issue back again.