I’m having a similar issue at the moment, API key has been added in the relevant field, but I’m getting the same error displaying in the console when viewing a property with latitude / longitude set.
Can’t provide a URL as I’m developing locally.
Is there any sign of this being fixed in the near future? I don’t want to waste time going and hacking apart plugin code to get it working if it can be avoided.
edit: tried disabling / re-activating the plugin to no avail