HTML5 Ajax Contact Form With Google Maps

Can anyone help me with the problem with goggle maps in this template.
The contact template works but the google map gives me the error

“Sorry! Something went wrong.
This page didn’t load Google Maps correctly. See the JavaScript console for technical details.”

Can anyone advise on the fix please?

I think you need API key from Google - https://developers.google.com/maps/documentation/android-api/signup