I don’t think I have a disk quota– I checked my dreamhost account just now and didn’t see one, no error messages, nothing to indicate anything is wrong on that end.
I wasn’t able to enable PHP errors to be written because it says you can’t do that with a live site. My site has been live for years now (with never a problem like this).
Everything else is fine.
BTW I am using safari as my browser, and on my blog I have automatic updates with the latest version of wordpress 5.3.2.