Error:  Data structure returned is not convertible in the requested format. Try to call this method with the parameters '&amp;format=original&amp;serialize=1'; you will get the original php data structure serialized. The data structure looks like this: 
 $data = array (
  'numSites' =&gt; 1,
  'totals' =&gt; 
  array (
    'nb_pageviews' =&gt; '3,052',
    'nb_visits' =&gt; '8,593',
    'nb_actions' =&gt; '15,375',
    'revenue' =&gt; '0',
    'nb_visits_lastdate' =&gt; 4526.0,
  ),
  'lastDate' =&gt; '',
  'sites' =&gt; 
  array (
    0 =&gt; 
    array (
      'label' =&gt; 'masaki.muto.net',
      'nb_visits' =&gt; '8,593',
      'nb_actions' =&gt; '15,375',
      'nb_pageviews' =&gt; '3,052',
      'revenue' =&gt; '¥0',
      'nb_conversions' =&gt; 0,
      'visits_evolution' =&gt; '89.9%',
      'visits_evolution_trend' =&gt; 1,
      'actions_evolution' =&gt; '72.8%',
      'actions_evolution_trend' =&gt; 1,
      'pageviews_evolution' =&gt; '24.5%',
      'pageviews_evolution_trend' =&gt; 1,
      'revenue_evolution' =&gt; '0%',
      'revenue_evolution_trend' =&gt; 0,
      'nb_conversions_evolution' =&gt; '0%',
      'nb_conversions_evolution_trend' =&gt; 0,
      'idsite' =&gt; 2,
      'ratio' =&gt; 1,
      'currencySymbol' =&gt; '¥',
      'previous_nb_visits' =&gt; 4526,
      'periodName' =&gt; 'range',
      'previousRange' =&gt; 'Mar 8 – Apr 6, 2024',
      'previous_nb_actions' =&gt; 8895,
      'previous_Actions_nb_pageviews' =&gt; 2452,
      'previous_Goal_revenue' =&gt; 0,
      'previous_Goal_nb_conversions' =&gt; 0,
      'group' =&gt; '',
      'main_url' =&gt; 'http://masaki.muto.net',
    ),
  ),
);