@ Stephen
In the Console, you can click on the error link that Google provides. In you case the error link which comes after the error message is:
So, Google is saying that:
“The Google Maps JavaScript API is not activated on your API project. You may need to enable the Google Maps JavaScript API under APIs in the Google API Console./
According to the error message and its description, the Google Maps API has not been activated for the keys your generated for your project. You need to enable these, see Step 5 in the tutorial for how to get a Google Maps API Key It has the instructions you need to follow to enable the correct Google APIs so the maps will work.
Hope that helps!
ps. I’m going to delete the screenshots attached to your previous messages since they contain info that should not be posted publically.