Yes, it worked. But I thought maybe the message was trying to tell me something wasn’t set right. I wasn’t looking to get rid of the message…just find the cause! Would love to substitute the word “concerts” for “events” everywhere: “Events for September, 2018” (Calendar View), “Upcoming Events” (Map View), etc.
I found the extension: Change the Labels for “Events”, “Organizers”, or “Venues”. Tried it out on the staging site. Liked it, so now have it on the main site. Thank you!