I got that message on Win10 and Firefox 56.0.1
Same problem on Win10 + latest Chrome / Edge, this time the console log gives
GET https://maps.googleapis.com/maps/api/place/js/AutocompletionService.GetPredictions?1sbe&4sen&6m6&1m2&1d52.45731890866362&2d10.268801870612492&2m2&1d52.45818129133637&2d10.27021712938756&9sgeocode&15e3&key=AIzaSyAyIvICBrEltJGLQqoYygryRGe6HBxfNcQ&callback=_xdc_._1g6kiq&token=7826 net::ERR_ABORTED