Good evening Dan and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the maps not displaying properly on your site.
I would love to help you with this topic.
As a starting point, could it be possible to have a link to an URL where you are experiencing this issue ?
Secondly, could you please read the following knowledge base article carefully to ensure everything is set up properly ? https://theeventscalendar.com/knowledgebase/setting-up-your-google-maps-api-key/
Let me know how that goes.
Best regards,
Geoff B.