Hi Laura,
I used UpdraftPlus for my backup. Backed up into a Google Drive (when Google came back online!!) I haven’t tested the backup by reinstating a backup, just taking it on faith that it would work. 3 Million sites …..
The troublesome plugin was “Responsive Lightbox & Gallery”.
I disabled them all (and I think that the original creator had some installed that are not being used), then went back one at a time activating them. That one was the culprit.
But after updating it, all was OK.
Good luck and stay safe.
Gideon
Thanks so much Kharis.
You were absolutely correct, I had a troublesome plugin.
The troubleshooter you recommended wasn’t much help, enabling troubleshooting mode switched my theme and I couldn’t get back to the original theme without disabling troubleshooting mode.
But after installing a backup plugin, doing a backup (which was easy) I worked down the list of plugins until I found the culprit.
Now I feel much better about my (reluctant) role as web site admin.
Thanks again,
Gideon