I’m having the same problem, where the trending post does not working. My configuration just the same as junro79.
If the popular post section still not appear, it may because there is no views (traffic) at all on your posts. Perhaps you can visits several of your posts to generate popular views data.
can you elaborate more on how it works. how many views does it need to be shown in trending post?
if my post was currently below 5 posts does it work? or i need to have a lot posts?