Hi, pedro-co
This errors came from the old version of ja-googlemap plugin so I updated the plugin on your site.
Now, in a console log it shows error of google map developer:
RefererNotAllowedMapError - Error, it meant: The current URL loading the Maps JavaScript API has not been added to the list of allowed referrers. Please check the referrer settings of your API key in the Cloud Console.
Regards,
Vanhs