Sometimes it is just the plugins. Please try to disable all plugins and check if it works then.
Your console says that this is an API key error, not so much related to the theme itself.
The Maps JavaScript API is not activated on your API project. You may need to enable the Maps JavaScript API under APIs in the Google Cloud Platform Console.
Comments
The Maps JavaScript API is not activated on your API project.
You may need to enable the Maps JavaScript API under APIs in
the Google Cloud Platform Console.
See
Get an API key.