Hello,
Can you perhaps double check that you have activated all the required API from our documentation here? https://wp-events-plugin.com/documentation/google-maps/api-key/
If you have recently activated Google Map, Since few years ago Google started to require users to Enter a valid Billing Address on their Google Account. Please double check this setting on Google.
If you’re using using Divi, I would suggest checking with Divi documentation on how to use Google Maps, This is because Events manager detects if there’s any other Google Map api called and would use that to avoid conflict and multiple loading of Google Maps.
Additionally, When you’re adding a location for Google Maps, Can you perhaps check the console of your browser if they are showing any errors from Google Maps? If you’re using Google Chrome, You can do this by pressing F12 then click on Console Tab