Yes. I hadn’t accessed my site for some time and updated about 15 plugins all at once. Is there a way to undo all of those updates?
After the problem started, I also updated to version WordPress 4.8, hoping it would solve my problem. No luck.
Have I just made everything worse?
The bizarre thing is that my home page still has all the widgets operating properly (except the header). I don’t understand why I can’t view these settings.