Google maps was working perfect on my site, but since this week there's an error. It says:
When I look at the console there's no error...
I googled a bit and read about an API-key that's needed? Do you know? and if so, where can I insert the key in the theme dashboard?
Yes, the API key is now mandatory or Google is not showing Maps anymore on your site. Get your API key and paste it in Appearance -> Customize -> Google Maps.
Thanks! It works again!