Thanks everyone. Upgrading from 3.8.2 to 3.9.2 did the trick. Not sure what was interfering, but I also upgraded my PHP (7.2 to 7.3) so that might have been it (but doubtful as I am sure many other users with PHP 7.2 are working). The other thing was a glitch in a plugin that checks my email to make sure it works. Again, probably not. Probably just have to leave it in the "weird confluence of circumstances" category.