Need to add a variable to include your google maps API key for the map to work now. (At least for me).
I added to line 109 of session.php
..... src="https://maps.googleapis.com/maps/api/js?key=GOOGLEMAPSAPIKEY"></script>
I removed the sensor parameter as it looks like it's deprecated.
I got my key from here
https://developers.google.com/maps/documentation/javascript/
You will need a google id to get the key, then copy where GOOGLEMAPSAPIKEY is above.