This website was down for a week or so because of multiple problems. With the help of tech support at WordPress, I’ve got things working generally though there are some minor glitches. The most recent was an inability to preview posts and also I added and then deleted a user and his only post went with him. I can preview and now I only have a problem with some admin tasks bringing up a fresh login screen.
FWIW, it all started because I first loaded up WP nearly ten years ago and multiple update processes led to multiple files sort of working together. Sometimes there are good reasons to delete and install new, clean software.