Yes, it is activated.
I should note that I do not have a Posts page set in Settings > Reading > Front Page Displays > A static page > Posts Page. I did try assigning it to a page, but it did not change anything. (Reason I am not using a static page for posts page is that I am using Beaver Builder for the posts page).
I suppose it could be another plugin conflicting, but I have relatively few running.
Any other ideas?
Thanks for looking at this…