GOOGLE MAPS not work ?

First of all make sure that you have added google maps api key in the settings

For this please create your own API key for Google maps . Follow these steps to get an API key:

1. Go to the Google Cloud Platform Console.
2. Create or select a project.
3. Click Continue to enable the API and any related services.
4. On the Credentials page, get an API key. Note: If you have an existing unrestricted API key, or a key with browser restrictions, you may use that key.
5. From the dialog displaying the API key, select Restrict key to set a browser restriction on the API key.
6. In the Key restriction section, select HTTP referrers (web sites), then follow the on-screen instructions to set referrers.
7. (Optional) Enable billing. See Usage Limits for more information.

For more information on using the Google Cloud Platform Console, see API Console Help.

Add this key in Customizing – General – Apikey