How to debug SearchBox places results

[Kai]

I'm following the simple SearchBox example here: https://developers.google.com/maps/documentation/javascript/examples/places-searchbox#try-it-yourself

Everything is loading correctly but when I perform a search, no results are listed. I can see the <div class="pac-container pac-logo" style="display: none;"></div> at the bottom of the page and when I start to type results it changes to something like:

<div class="pac-container pac-logo" style="display: none; width: 298px; position: absolute; left: 691px; top: 484px;"></div>

Which shows it responding but I think it remains "display:none" because there is no results being returned, the div remains empty.

Does anyone know how I can debug the SearchBox response? I'm not sure how to check why no results are being returned.