Or rather, Google thinks the site is broken. A workaround, if not a fix, for the problem with Google refusing to index this site seemed to have finally taken hold. Everything looked okay on the Google Search Console, and all I had to do was wait a few days for Google to crawl through everything.
But the blog’s technical problems must be too serious even for Google. The process of crawling through everything seems to have busted the search console. It thinks at some level the site can’t be found.
Update: Now it’s working again. I checked the Google Search Console this morning and the error was still there. When I checked an hour later it was working. All I did in between was have a muffin and instant coffee, but I guess that must have fixed it! 😉