Until Friday everything was fine and dandy with the website, but now the index file is not rendering correctly on the website. However, the index file renders just fine in RStudio.
My first guess is that the scsss file could not be found, but I never moved this file! The files I changed on Friday had nothing to do with the scss file and these files seen to have no build errors, so I'm not sure what may be the culprit.
I cloned and rendered the repo, so I'm starting with a clean slate. I found that the index page renders the same in the RStudio viewer pane and in the Brave, Safari and Vivaldi browsers. Nothing else is found, though, besides that page—everything else is 404. But, aside from the formatting of the pages, everything seems to be included in the deployment site you linked. It looks like most of the stuff in _freeze is missing from _site.