Error: Data structure returned is not convertible in the requested format: Only integer keys supported for array columns on base level. Unsupported string 'metadata' found for row 'array (
  'category' => 'Visitors',
  'subcategory' => 'Locations',
  'name' => 'Country',
  'module' => 'UserCountry',
  'action' => 'getCountry',
  'dimension' => 'Country',
  'documentation' => 'Shows which country your visitors connected from when accessing your website.',
  'metrics' => 
  array (
    'nb_visits' => 'Visits',
    'nb_uniq_visitors' => 'Unique visitors',
    'nb_actions' => 'Actions',
  ),
  'metricsDocumentation' => 
  array (
    'nb_visits' => 'If a visitor comes to your '. Try to call this method with the parameters '&format=original&serialize=1'; you will get the original php data structure serialized.