Thanks for the ideas!
All check out as okay, but the plug-in check, a long task which I will begin now.
I can’t help thinking that I may have changed a setting somewhere. I have added no new plugins since the error appeared (though some have updated with the new WP), and all my plugins are reliable/stable and support for the likely culprits reports no similar errors.
More basically, is there any normal WP setting which may do this?
Thanks for the reply!
Yup, neither of those conditions apply here. I’ll await your next upgrade and let you know one way or another!