Google Maps throwing lots of errors

Hi guys,

OK I have just installed latest Google Maps plugin on the latest Events+ and when I go to add a map the map does not appear. Looking in Google console I get a load of errors relating to the Google Maps plugin:

SVGElement.offsetWidth' is deprecated and will be removed in M50, around April 2016. See https://www.chromestatus.com/features/5724912467574784 for more details.
util.js:210 Google Maps API warning: NoApiKeys https://developers.google.com/maps/documentation/javascript/error-messages#no-api-keys
util.js:210 Google Maps API warning: SensorNotRequired https://developers.google.com/maps/documentation/javascript/error-messages#sensor-not-required
js?v=3&libraries=panoramio,panoramio&sensor=false&callback=agmInitialize:37 Google Maps API error: MissingKeyMapError https://developers.google.com/maps/documentation/javascript/error-messages#missing-key-map-error_.hb @ js?v=3&libraries=panoramio,panoramio&sensor=false&callback=agmInitialize:37(anonymous function) @ common.js:51(anonymous function) @ common.js:191c @ common.js:45(anonymous function) @ AuthenticationService.Authenticate?1shttp%3A%2F%2Fwww.nomadpodcast.co.uk%2Fwp-admin%2Fpost.php%3Fpo…:1
google-maps.min.js?ver=4.6.1:4 getCurrentPosition() and watchPosition() are deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.
js?v=3&libraries=panoramio,panoramio&sensor=false&callback=agmInitialize:98 Uncaught TypeError: Cannot read property 'addEventListener' of undefined

Sometimes the map is about to load but then this message appears:

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

I tried in Chrome and Firefox browser, same errors. It looks like its looking for API details but I can see no place to set this up and its not in the plugin's usage instructions.

Any help much appreciated.

Thanks