NOTE: The original problem is solved. The public views work fine. The error I’m getting is only in the admin. This error occurred after I updated the add-ons.
Here is the other information you requested:
I upgraded from 4.2.47 to the latest. I did the add-on upgrade manually as per your instructions.
The “Center At” setting was blank. I put the company’s address there and it made no difference.
The settings are all the same as before the upgrade and, like I said, works great on the public side.