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 (
  'website' =&gt; 'RADdO - Réseau d’Archives et de Documentation de l’Oralité',
  'prettyDate' =&gt; 'Saturday, May 4, 2024',
  'metadata' =&gt; 
  array (
    'category' =&gt; 'Visitors',
    'subcategory' =&gt; 'Locations',
    'name' =&gt; 'Country',
    'module' =&gt; 'UserCountry',
    'action' =&gt; 'getCountry',
    'dimension' =&gt; 'Country',
    'documentation' =&gt; 'Shows which country your visitors connected from when accessing your website.',
    'metrics' =&gt; 
    array (
      'nb_visits' =&gt; 'Visits',
      'nb_uniq_visitors' =&gt; 'Unique visitors',
      'nb_actions' =&gt; 'Actions',
    ),
    'metricsDocumentation' =&gt; 
    array (
      'nb_visits' =&gt; 'If a visitor comes to your website for the first time or if they visit a page more than 30 minutes after their last page view, this will be recorded as a new visit.',
      'nb_uniq_visitors' =&gt; 'The number of unduplicated visitors coming to your website. Every user is only counted once, even if they visit the website multiple times a day.',
      'nb_actions' =&gt; 'The number of actions performed by your visitors. Actions can be page views, internal site searches, downloads or outlinks.',
      'nb_actions_per_visit' =&gt; 'The average number of actions (page views, site searches, downloads or outlinks) that were performed during the visits.',
      'avg_time_on_site' =&gt; 'The average duration of a visit.',
      'bounce_rate' =&gt; 'The percentage of visits that only had a single pageview. This means, that the visitor left the website directly from the entrance page.',
      'conversion_rate' =&gt; 'The percentage of visits that triggered a goal conversion.',
    ),
    'processedMetrics' =&gt; 
    array (
      'nb_actions_per_visit' =&gt; 'Actions per Visit',
      'avg_time_on_site' =&gt; 'Avg. Time on Website',
      'bounce_rate' =&gt; 'Bounce Rate',
    ),
    'metricTypes' =&gt; 
    array (
      'nb_visits' =&gt; 'number',
      'nb_uniq_visitors' =&gt; 'number',
      'nb_actions' =&gt; 'number',
      'nb_actions_per_visit' =&gt; 'number',
      'avg_time_on_site' =&gt; 'duration_s',
      'bounce_rate' =&gt; 'percent',
      'conversion_rate' =&gt; 'percent',
    ),
    'metricsGoal' =&gt; 
    array (
      'nb_conversions' =&gt; 'Conversions',
      'revenue' =&gt; 'Revenue',
    ),
    'processedMetricsGoal' =&gt; 
    array (
      'revenue_per_visit' =&gt; 'Revenue per Visit',
    ),
    'imageGraphUrl' =&gt; 'index.php?module=API&amp;method=ImageGraph.get&amp;idSite=1&amp;apiModule=UserCountry&amp;apiAction=getCountry&amp;token_auth=anonymous&amp;period=day&amp;date=yesterday',
    'imageGraphEvolutionUrl' =&gt; 'index.php?module=API&amp;method=ImageGraph.get&amp;idSite=1&amp;apiModule=UserCountry&amp;apiAction=getCountry&amp;token_auth=anonymous&amp;period=day&amp;date=2024-04-05,2024-05-04',
    'uniqueId' =&gt; 'UserCountry_getCountry',
  ),
  'columns' =&gt; 
  array (
    'label' =&gt; 'Country',
    'nb_visits' =&gt; 'Visits',
    'nb_uniq_visitors' =&gt; 'Unique visitors',
    'nb_actions' =&gt; 'Actions',
    'nb_actions_per_visit' =&gt; 'Actions per Visit',
    'avg_time_on_site' =&gt; 'Avg. Time on Website',
    'bounce_rate' =&gt; 'Bounce Rate',
    'revenue' =&gt; 'Revenue',
  ),
  'reportData' =&gt; 
  \Piwik\DataTable::__set_state(array(
     'rows' =&gt; 
    array (
      0 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'France',
         'nb_uniq_visitors' =&gt; 339,
         'nb_visits' =&gt; 351,
         'nb_actions' =&gt; 828,
         'revenue' =&gt; '€0',
         'nb_actions_per_visit' =&gt; 2.4,
         'avg_time_on_site' =&gt; '00:01:45',
         'bounce_rate' =&gt; '72%',
      )),
      1 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Canada',
         'nb_uniq_visitors' =&gt; 11,
         'nb_visits' =&gt; 11,
         'nb_actions' =&gt; 21,
         'nb_actions_per_visit' =&gt; 1.9,
         'avg_time_on_site' =&gt; '00:01:48',
         'bounce_rate' =&gt; '64%',
         'revenue' =&gt; '€0',
      )),
      2 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Belgium',
         'nb_uniq_visitors' =&gt; 5,
         'nb_visits' =&gt; 5,
         'nb_actions' =&gt; 5,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      3 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Réunion',
         'nb_uniq_visitors' =&gt; 4,
         'nb_visits' =&gt; 4,
         'nb_actions' =&gt; 12,
         'revenue' =&gt; '€0',
         'nb_actions_per_visit' =&gt; 3.0,
         'avg_time_on_site' =&gt; '00:09:45',
         'bounce_rate' =&gt; '75%',
      )),
      4 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Switzerland',
         'nb_uniq_visitors' =&gt; 4,
         'nb_visits' =&gt; 4,
         'nb_actions' =&gt; 6,
         'nb_actions_per_visit' =&gt; 1.5,
         'avg_time_on_site' =&gt; '00:00:07',
         'bounce_rate' =&gt; '75%',
         'revenue' =&gt; '€0',
      )),
      5 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Spain',
         'nb_uniq_visitors' =&gt; 3,
         'nb_visits' =&gt; 3,
         'nb_actions' =&gt; 5,
         'nb_actions_per_visit' =&gt; 1.7,
         'avg_time_on_site' =&gt; '00:00:22',
         'bounce_rate' =&gt; '67%',
         'revenue' =&gt; '€0',
      )),
      6 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Algeria',
         'nb_uniq_visitors' =&gt; 2,
         'nb_visits' =&gt; 2,
         'nb_actions' =&gt; 2,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      7 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Côte d’Ivoire',
         'nb_uniq_visitors' =&gt; 2,
         'nb_visits' =&gt; 2,
         'nb_actions' =&gt; 2,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      8 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Germany',
         'nb_uniq_visitors' =&gt; 2,
         'nb_visits' =&gt; 2,
         'nb_actions' =&gt; 18,
         'revenue' =&gt; '€0',
         'nb_actions_per_visit' =&gt; 9.0,
         'avg_time_on_site' =&gt; '00:07:36',
         'bounce_rate' =&gt; '50%',
      )),
      9 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Italy',
         'nb_uniq_visitors' =&gt; 2,
         'nb_visits' =&gt; 2,
         'nb_actions' =&gt; 8,
         'nb_actions_per_visit' =&gt; 4.0,
         'avg_time_on_site' =&gt; '00:02:24',
         'bounce_rate' =&gt; '50%',
         'revenue' =&gt; '€0',
      )),
      10 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'United Kingdom',
         'nb_uniq_visitors' =&gt; 2,
         'nb_visits' =&gt; 2,
         'nb_actions' =&gt; 2,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      11 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'United States',
         'nb_uniq_visitors' =&gt; 2,
         'nb_visits' =&gt; 2,
         'nb_actions' =&gt; 3,
         'nb_actions_per_visit' =&gt; 1.5,
         'avg_time_on_site' =&gt; '00:00:30',
         'bounce_rate' =&gt; '50%',
         'revenue' =&gt; '€0',
      )),
      12 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Australia',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      13 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Cameroon',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      14 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Luxembourg',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      15 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Mauritius',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      16 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Morocco',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      17 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Netherlands',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      18 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Russia',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      19 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Senegal',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      20 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Seychelles',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      21 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Tanzania',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
      22 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'label' =&gt; 'Turkey',
         'nb_uniq_visitors' =&gt; 1,
         'nb_visits' =&gt; 1,
         'nb_actions' =&gt; 1,
         'nb_actions_per_visit' =&gt; 1.0,
         'avg_time_on_site' =&gt; '00:00:00',
         'bounce_rate' =&gt; '100%',
         'revenue' =&gt; '€0',
      )),
    ),
     'currentId' =&gt; 4,
     'depthLevel' =&gt; 0,
     'indexNotUpToDate' =&gt; true,
     'rebuildIndexContinuously' =&gt; false,
     'tableSortedBy' =&gt; false,
     'queuedFilters' =&gt; 
    array (
    ),
     'disabledFilters' =&gt; 
    array (
    ),
     'rowsCountBeforeLimitFilter' =&gt; 0,
     'enableRecursiveSort' =&gt; false,
     'enableRecursiveFilters' =&gt; false,
     'rowsIndexByLabel' =&gt; 
    array (
    ),
     'summaryRow' =&gt; NULL,
     'totalsRow' =&gt; NULL,
     'metadata' =&gt; 
    array (
    ),
     'maximumAllowedRows' =&gt; 0,
  )),
  'reportMetadata' =&gt; 
  \Piwik\DataTable::__set_state(array(
     'rows' =&gt; 
    array (
      0 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'fr',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/fr.png',
         'segment' =&gt; 'countryCode==fr',
         'logoHeight' =&gt; 16,
      )),
      1 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'ca',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/ca.png',
         'segment' =&gt; 'countryCode==ca',
         'logoHeight' =&gt; 16,
      )),
      2 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'be',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/be.png',
         'segment' =&gt; 'countryCode==be',
         'logoHeight' =&gt; 16,
      )),
      3 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 're',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/re.png',
         'segment' =&gt; 'countryCode==re',
         'logoHeight' =&gt; 16,
      )),
      4 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'ch',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/ch.png',
         'segment' =&gt; 'countryCode==ch',
         'logoHeight' =&gt; 16,
      )),
      5 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'es',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/es.png',
         'segment' =&gt; 'countryCode==es',
         'logoHeight' =&gt; 16,
      )),
      6 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'dz',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/dz.png',
         'segment' =&gt; 'countryCode==dz',
         'logoHeight' =&gt; 16,
      )),
      7 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'ci',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/ci.png',
         'segment' =&gt; 'countryCode==ci',
         'logoHeight' =&gt; 16,
      )),
      8 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'de',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/de.png',
         'segment' =&gt; 'countryCode==de',
         'logoHeight' =&gt; 16,
      )),
      9 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'it',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/it.png',
         'segment' =&gt; 'countryCode==it',
         'logoHeight' =&gt; 16,
      )),
      10 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'gb',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/gb.png',
         'segment' =&gt; 'countryCode==gb',
         'logoHeight' =&gt; 16,
      )),
      11 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'us',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/us.png',
         'segment' =&gt; 'countryCode==us',
         'logoHeight' =&gt; 16,
      )),
      12 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'au',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/au.png',
         'segment' =&gt; 'countryCode==au',
         'logoHeight' =&gt; 16,
      )),
      13 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'cm',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/cm.png',
         'segment' =&gt; 'countryCode==cm',
         'logoHeight' =&gt; 16,
      )),
      14 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'lu',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/lu.png',
         'segment' =&gt; 'countryCode==lu',
         'logoHeight' =&gt; 16,
      )),
      15 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'mu',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/mu.png',
         'segment' =&gt; 'countryCode==mu',
         'logoHeight' =&gt; 16,
      )),
      16 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'ma',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/ma.png',
         'segment' =&gt; 'countryCode==ma',
         'logoHeight' =&gt; 16,
      )),
      17 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'nl',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/nl.png',
         'segment' =&gt; 'countryCode==nl',
         'logoHeight' =&gt; 16,
      )),
      18 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'ru',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/ru.png',
         'segment' =&gt; 'countryCode==ru',
         'logoHeight' =&gt; 16,
      )),
      19 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'sn',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/sn.png',
         'segment' =&gt; 'countryCode==sn',
         'logoHeight' =&gt; 16,
      )),
      20 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'sc',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/sc.png',
         'segment' =&gt; 'countryCode==sc',
         'logoHeight' =&gt; 16,
      )),
      21 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'tz',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/tz.png',
         'segment' =&gt; 'countryCode==tz',
         'logoHeight' =&gt; 16,
      )),
      22 =&gt; 
      \Piwik\DataTable\Row::__set_state(array(
         'code' =&gt; 'tr',
         'logo' =&gt; 'plugins/Morpheus/icons/dist/flags/tr.png',
         'segment' =&gt; 'countryCode==tr',
         'logoHeight' =&gt; 16,
      )),
    ),
     'currentId' =&gt; 3,
     'depthLevel' =&gt; 0,
     'indexNotUpToDate' =&gt; true,
     'rebuildIndexContinuously' =&gt; false,
     'tableSortedBy' =&gt; false,
     'queuedFilters' =&gt; 
    array (
    ),
     'disabledFilters' =&gt; 
    array (
    ),
     'rowsCountBeforeLimitFilter' =&gt; 0,
     'enableRecursiveSort' =&gt; false,
     'enableRecursiveFilters' =&gt; false,
     'rowsIndexByLabel' =&gt; 
    array (
    ),
     'summaryRow' =&gt; NULL,
     'totalsRow' =&gt; NULL,
     'metadata' =&gt; 
    array (
    ),
     'maximumAllowedRows' =&gt; 0,
  )),
  'reportTotal' =&gt; 
  array (
    'nb_uniq_visitors' =&gt; 389,
    'nb_visits' =&gt; 401,
    'nb_actions' =&gt; 923,
    'nb_users' =&gt; 0,
    'max_actions' =&gt; 147.0,
    'sum_visit_length' =&gt; 41746,
    'bounce_count' =&gt; 291,
    'nb_visits_converted' =&gt; 12,
    'goals' =&gt; 
    array (
      'idgoal=1' =&gt; 
      array (
        'nb_conversions' =&gt; 12,
        'nb_visits_converted' =&gt; 12,
        'revenue' =&gt; 0.0,
      ),
    ),
    'nb_conversions' =&gt; 12,
    'revenue' =&gt; 0.0,
    'nb_actions_per_visit' =&gt; 2.3,
  ),
  'timerMillis' =&gt; '98',
);