Not finding the error string in the plugin’s code, so it’s probably part of a response from Google itself.
Do you have a link to where you’re trying to use the plugin for an embed?
I don’t see where I would enter an API code for this plugin anywhere. That’s probably what I’m missing right?
Honestly the Map implementation likely needs updated to match Google’s current requirements. Actual development on the plugin hasn’t occurred for a long time and it hasn’t kept up with Google. It’s also not presently a high priority item, truth be told. If you’re ambitious, we have no issue with you or someone else tinkering around in the code as necessary.
The API has changed. You now need to get an API key from google dev console and pass it on as a param when loading the maps –
https://developers.google.com/maps/documentation/javascript/get-api-key
Then edit ‘post-google-map/map-lib/Google-Map-Class.php’ line 32 to include your API key;
$js_footer .= '<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&key=YourApiKey"></script>';