Google GeoChart适用于一个域，而不适用于另一个域

I know this is a vague question but than again this is a vague problem.

I have a simple Google GeoChart like so:

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>


   <div id="regions_div" style="width: 900px; height: 500px;"></div>

<script>
  google.charts.load('current', {'packages':['geochart']});
  google.charts.setOnLoadCallback(drawRegionsMap);

  function drawRegionsMap() {

    var data = google.visualization.arrayToDataTable([
      ['Country', 'Popularity'],
      ['Germany', 200],
      ['United States', 300],
      ['Brazil', 400],
      ['Canada', 500],
      ['France', 600],
      ['RU', 700]
    ]);

    var options = {'displayMode': 'markers'};

    var chart = new google.visualization.GeoChart(document.getElementById('regions_div'));

    chart.draw(data, options);
  }
</script>

you can find it here: https://jsfiddle.net/0rd3hp7a/

now here's the thing. I have 2 domains / url's linked to this .php file.

the map generates fine on one domain and on the other the map pops up but the green markers do not.

Both domains run under php 5.2.17 and the provider tells me that both domains have same settings ... which is hard to believe since they work differently of the SAME file.

Any ideas where I can look for the problem???