Error:  Data structure returned is not convertible in the requested format. Try to call this method with the parameters '&format=original&serialize=1'; you will get the original php data structure serialized. The data structure looks like this: 
 $data = array (
  'numSites' => 5,
  'totals' => 
  array (
    'nb_pageviews' => '898',
    'nb_visits' => '584',
    'nb_actions' => '1,048',
    'revenue' => '0',
    'nb_visits_lastdate' => 642.0,
  ),
  'lastDate' => '2024-05-17',
  'sites' => 
  array (
    0 => 
    array (
      'label' => 'Musyno Magazin',
      'nb_visits' => '223',
      'nb_actions' => '294',
      'nb_pageviews' => '267',
      'revenue' => '€0',
      'nb_conversions' => 0,
      'visits_evolution' => '0.9%',
      'visits_evolution_trend' => 1,
      'actions_evolution' => '-10.9%',
      'actions_evolution_trend' => -1,
      'pageviews_evolution' => '-5.7%',
      'pageviews_evolution_trend' => -1,
      'revenue_evolution' => '0%',
      'revenue_evolution_trend' => 0,
      'nb_conversions_evolution' => '0%',
      'nb_conversions_evolution_trend' => 0,
      'idsite' => 23,
      'ratio' => 1,
      'currencySymbol' => '€',
      'previous_nb_visits' => 221,
      'periodName' => 'day',
      'previousRange' => 'Fri, May 17',
      'previous_nb_actions' => 330,
      'previous_Actions_nb_pageviews' => 283,
      'previous_Goal_revenue' => 0,
      'previous_Goal_nb_conversions' => 0,
      'group' => '',
      'main_url' => 'https://www.musyno.com',
    ),
    1 => 
    array (
      'label' => 'Blockflöten-Treff',
      'nb_visits' => '183',
      'nb_actions' => '327',
      'nb_pageviews' => '286',
      'revenue' => '$0',
      'nb_conversions' => 0,
      'visits_evolution' => '0%',
      'visits_evolution_trend' => 0,
      'actions_evolution' => '-9.7%',
      'actions_evolution_trend' => -1,
      'pageviews_evolution' => '-2.7%',
      'pageviews_evolution_trend' => -1,
      'revenue_evolution' => '0%',
      'revenue_evolution_trend' => 0,
      'nb_conversions_evolution' => '0%',
      'nb_conversions_evolution_trend' => 0,
      'idsite' => 14,
      'ratio' => 1,
      'currencySymbol' => '$',
      'previous_nb_visits' => 183,
      'periodName' => 'day',
      'previousRange' => 'Fri, May 17',
      'previous_nb_actions' => 362,
      'previous_Actions_nb_pageviews' => 294,
      'previous_Goal_revenue' => 0,
      'previous_Goal_nb_conversions' => 0,
      'group' => '',
      'main_url' => 'https://www.blockfloeten-treff.de',
    ),
    2 => 
    array (
      'label' => 'Alles über Boomwhackers',
      'nb_visits' => '63',
      'nb_actions' => '128',
      'nb_pageviews' => '115',
      'revenue' => '$0',
      'nb_conversions' => 0,
      'visits_evolution' => '-39.4%',
      'visits_evolution_trend' => -1,
      'actions_evolution' => '-49.2%',
      'actions_evolution_trend' => -1,
      'pageviews_evolution' => '-46.5%',
      'pageviews_evolution_trend' => -1,
      'revenue_evolution' => '0%',
      'revenue_evolution_trend' => 0,
      'nb_conversions_evolution' => '0%',
      'nb_conversions_evolution_trend' => 0,
      'idsite' => 9,
      'ratio' => 1,
      'currencySymbol' => '$',
      'previous_nb_visits' => 104,
      'periodName' => 'day',
      'previousRange' => 'Fri, May 17',
      'previous_nb_actions' => 252,
      'previous_Actions_nb_pageviews' => 215,
      'previous_Goal_revenue' => 0,
      'previous_Goal_nb_conversions' => 0,
      'group' => '',
      'main_url' => 'https://www.boomtreff.de',
    ),
    3 => 
    array (
      'label' => 'Drumtreff',
      'nb_visits' => '59',
      'nb_actions' => '122',
      'nb_pageviews' => '89',
      'revenue' => '$0',
      'nb_conversions' => 0,
      'visits_evolution' => '-24.4%',
      'visits_evolution_trend' => -1,
      'actions_evolution' => '2.5%',
      'actions_evolution_trend' => 1,
      'pageviews_evolution' => '-15.2%',
      'pageviews_evolution_trend' => -1,
      'revenue_evolution' => '0%',
      'revenue_evolution_trend' => 0,
      'nb_conversions_evolution' => '0%',
      'nb_conversions_evolution_trend' => 0,
      'idsite' => 18,
      'ratio' => 1,
      'currencySymbol' => '$',
      'previous_nb_visits' => 78,
      'periodName' => 'day',
      'previousRange' => 'Fri, May 17',
      'previous_nb_actions' => 119,
      'previous_Actions_nb_pageviews' => 105,
      'previous_Goal_revenue' => 0,
      'previous_Goal_nb_conversions' => 0,
      'group' => '',
      'main_url' => 'https://www.drumtreff.de',
    ),
    4 => 
    array (
      'label' => 'Motor Service Hohls',
      'nb_visits' => '56',
      'nb_actions' => '177',
      'nb_pageviews' => '141',
      'revenue' => '€0',
      'nb_conversions' => 0,
      'visits_evolution' => '0%',
      'visits_evolution_trend' => 0,
      'actions_evolution' => '3.5%',
      'actions_evolution_trend' => 1,
      'pageviews_evolution' => '13.7%',
      'pageviews_evolution_trend' => 1,
      'revenue_evolution' => '0%',
      'revenue_evolution_trend' => 0,
      'nb_conversions_evolution' => '0%',
      'nb_conversions_evolution_trend' => 0,
      'idsite' => 2,
      'ratio' => 1,
      'currencySymbol' => '€',
      'previous_nb_visits' => 56,
      'periodName' => 'day',
      'previousRange' => 'Fri, May 17',
      'previous_nb_actions' => 171,
      'previous_Actions_nb_pageviews' => 124,
      'previous_Goal_revenue' => 0,
      'previous_Goal_nb_conversions' => 0,
      'group' => '',
      'main_url' => 'http://www.suzuki-hohls.de',
    ),
  ),
);