Google Maps does not work

I installed Events Manager and I’m satisfied except for one problem: Google maps do not show up in my events. I created an API Key for Google Maps, I inserted in the appropriate field, in the settings of the plugin, but the image does not appear.

Example: http://olharanimal.org/eventos/adote-um-bichinho-e-salve-uma-vida-2016-11-18/

Sorry for bad English, I’m using Google Translator.