I don't know what to tell you. It's a simple HTTP call to Googles API. If it's not working then you've something on your host preventing the HTTP call from working perhaps (firewall maybe? functions used by CBs Snoopy library disabled?).
You can try navigating to Googles API response directly using the below URL structure and see what Google responds.
https://maps.googleapis.com/maps/api/geocode/json?address=URL_ENCODED_ADDRESS_HERE&sensor=false
Don't forget to urlencode the address first (plenty of online tools can do this for you).
The entire exchange is handled within the Event integration on lines 892 and 914. You need to ensure a Location and Address are supplied when creating the event.
If you get a response using the direct URL method above then there's no reason for it not to work in GJ. If you do get a response please PM backend super administrator login credentials and will take a look.