Google have recently changed their terms of service & are now charging for all Mapping services whereas previously this was free.
Information on Google Maps pricing: https://cloud.google.com/maps-platform/pricing/
At the time of writing, you should be credited $200 per month for mapping services, any usage above this is chargeable.
As such we need to use a Google Maps API key under a paid for Google Account for all websites that use this service.
To generate your own API key follow these steps:
1) Create a Google Cloud billing account (if you don’t already have one), and add your company credit card details to this: https://cloud.google.com/billing/docs/how-to/manage-billing-account
3) Restrict your API key to your own domain. You should put your domain name, followed by an asterisk to limit the API key to your website only. E.g. https://graylinespain.com/*
4) Provide us with your API key, e.g. AIzaSyC49grgePHoKKXy5Dzj21ir9STIme_wpyg