Hi Henning and thank you for your reply. Very helpful.
I run the AdGuard ad blocker in Chrome. I hadn’t made any changes to my settings and prior to yesterday hadn’t had any trouble uploading media (images and ads) to our website.
But yes… something switched and all of the sudden, it started treating the popup window to select/upload media as a window to be blocked. I turned off AdGuard for my site… and voila. All good again.
Thanks again for your quick help!
Greg.