Hi, I am having the same issue with location fields giving the error "This page can't load Google Maps correctly. "  Currently i have found this issue on the event pages although i have not got round to checking on other areas.

As recomended in the previous post i checked that allow_url_fopen was on

I have a valid api key that runs (and works) on our other sites.  This has been added to the una settings.  The sub domain which our una installation runs on has been added to the Google API project settings.  From the source code I can see that the api key is present in two places, the link to call the file on Googles server and lower down in conditional statement.  

In the dev console it reports that "This API project is not authorized to use this API".

I wondered if the sub domain was a problem, perhaps UNA did not call the javascript file from the sub domain.  So i added a new key that had no restrictions on it, the same problem happened.

Looking at the source code UNA calls the js file differently to that which Google recommends.

Google recommends: src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY"

UNA calls:   src="https://maps.google.com/maps/api/js?libraries=places&language=en&key=YOUR_API_KEY"

The difference is highlighted in bold

The full recomended call to Google is: 

<script async defer src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap"
  type="text/javascript"></script>

I hope someone from una is reading this as it looks like it is a coding issue rather than a settings one and thus out of my control to fix.

While i am here there is another issue in the event section, this shows up where the Upload New Event Picture should be: a:1:{i:0;s:22:"bx_events_picture_crop";} 

Kind regards

Mark