Errors adding map location to event

When I try to specify a map location as a latitude, longiture on the Add Event screen, I get an error:

Autocomplete’s returned place contains no geometry

Everything works fine if I enter a place name and then move the marker. I am using the format

52.091432 , -1.948959

I do not know whether it is related, but when I inspect browser console, the page has an error:

Uncaught ReferenceError: google is not defined
<anonymous> https://test.eveshamwalkfest.org.uk/wp-admin/post.php?post=5436&action=edit:1036
post.php:1036:7

This points to the line
google.maps.event.addDomListener(window, "load", initMap);

I have checked it out with Twenty Twenty-Two theme and with all except essential plugins disabled so I thin the Events plugin has the problem.

I have Google Maps set to use the API and have set a valid API key.
Can you please advise?

Thank you.