Google Maps JavaScript API callback error

I’m starting to see the following error on the dashboard in developer tools when using a Google Map. I have all of the proper implementation and code in the functions file for ACF. Any idea how to fix this and is this something to be concerned about? It doesn’t seem to affect functionality (yet).

Loading the Google Maps JavaScript API without a callback is not supported: https://developers.google.com/maps/documentation/javascript/url-params#required_parameters