Past June 22nd Google applied some changes to the terms of service for their API. All new domains using their API will be required to use an API key and domains already using their API without a key are highly advice to start using one although no disruption in the service is planned. You can see the details visiting this link:
https://developers.google.com/maps/documentation/javascript/get-api-key
Our Locations Manager addon depends heavily on Google Maps API to offer its nice features so I have written a step by step tutorial to make it easier for you to get a new Google Maps API Key to use in your new projects with Locations Manager:
https://www.jevents.net/docs/club-addons/item/getting-an-api-key-for-google-maps
I hope this helps you set up your Locations Manager installation quicker.