Thank you for your response. It is working correctly now.
What is perplexing is that I never changed any plugin settings between the time when it wasn’t working and when it was…
Maybe there is a delay on Google’s end between when you sign up for the API key and when it starts working?
Maybe I had a conflict with some other plugin I am using, and when I deactivated the other one, this one started working?
I dunno, but it is working beautifully now. Thanks for the great plugin.