Thanks, Fernando. I managed to put it back in though WordPress kept removing it. It now works! Many thanks for a quick response.
I also have this problem. See https://trinisue.com/select-posts-by-category/coronavirus-in-tt/
I did the fixes as suggested to Jana but it still doesn’t work. This is a new page copied from similar pages which do continue to work. When I messed with a previous page (health & fitness) then that also now doesn’t work.
What to do?
Susan