Blogdown site: "Page Not Found" error, but Netlify reports "Site is live"



Continuing the discussion from What's your blogdown workflow to include work from other projects

Also, the SO question on the matter is posted here:


Some extra facts (not in SO question):

What triggered it: an attempt to stop building my site locally (i.e. clearing git cache and adding public and blogdown to .gitignore). Also documented in this SO question: