github.io example site does work, missing API keys

[nuclearspike]

Referencing this site:
http://google-map-react.github.io/google-map-react/map/events/

The site loads and then goes gray and shows: "Oops! Something went wrong.
This page didn't load Google Maps correctly. See the JavaScript console for technical details."

Console messages include:

• Google Maps API error: MissingKeyMapError https://developers.google.com/maps/documentation/javascript/error-messages#missing-key-map-error
• Google Maps API warning: NoApiKeys https://developers.google.com/maps/documentation/javascript/error-messages#no-api-keys