Hey Barry and so sorry for the trouble here!
Thanks a ton for checking the console for errors up front–that’s a huge help and I appreciate it.
Just to completely rule out any conflicts:
Deactivated all other plugins? Yes
Switched to a default theme? Yes
Did maps work when you tried these? How about when you deactivate all other plugins and switch to the default WordPress Twenty Fifteen theme together?
If you do see the map in those conditions, then we will need to look for the conflict from there.
If you do not see the map in those conditions, my hunch involves hosting. But we let’s see what we find here first and then explore that if we need to.
Cheers!
Geoff