Hi
Google map is a paid service, so you must enable billing http://prntscr.com/tluhn0 https://developers.google.com/maps/gmp-get-started and use API key. In another case, you will have the title “for development purposes only” http://prntscr.com/tluj7f
Also read the following instruction .
https://stackoverflow.com/questions/58268679/enable-billing-on-the-google-cloud-project















