Are you going crazy due to the Google Maps API error: MissingKeyMapError, suddenly showing in your browser console? Here you have the explanation (and solution), directly from a Google employee:
We've just announced some changes to the Google Maps APIs authentication and usage limits:
Usage of the Google Maps APIs now requires a key.
If you are using the Google Maps API on localhost or your domain was not active prior to June 22nd, 2016, it will require a key going forward. To fix this problem, please see the Google Maps APIs documentation to get a key and add it to your application:
Are you using the Maps API from localhost or a recently launched domain, or was your domain active prior to today? Just wanting to check, since all previously active domains should have been grandfathered for keyless usage, so a previously active domain getting the MissingKeyMapError may be a bug.
In other words, if you weren’t already using Maps API on your domain before June 22nd, 2016, you will be forced to get a API key to get rid of this nasty error.
Keep in mind that each free API key comes with a 25,000 map loads per project per day limit (you can always create multiple projects, though). For very large websites, you could possibly need a Premium Plan license.
This obviously apply to every environment, disregarding the platform (WordPress, Joomla, etc.) or plugin you are using.