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 ( 0 => array ( 'uniqueId' => 'General_Actions', 'name' => 'Behaviour', 'subcategories' => array ( 0 => array ( 'uniqueId' => 'VisitorInterest_Engagement', 'name' => 'Engagement', ), 1 => array ( 'uniqueId' => 'Transitions_Transitions', 'name' => 'Transitions', ), 2 => array ( 'uniqueId' => 'General_Downloads', 'name' => 'Downloads', ), 3 => array ( 'uniqueId' => 'Actions_SubmenuPagesEntry', 'name' => 'Entry pages', ), 4 => array ( 'uniqueId' => 'Actions_SubmenuPagesExit', 'name' => 'Exit pages', ), 5 => array ( 'uniqueId' => 'General_Outlinks', 'name' => 'Outlinks', ), 6 => array ( 'uniqueId' => 'Actions_SubmenuPageTitles', 'name' => 'Page titles', ), 7 => array ( 'uniqueId' => 'General_Pages', 'name' => 'Pages', ), 8 => array ( 'uniqueId' => 'Actions_SubmenuSitesearch', 'name' => 'Site Search', ), 9 => array ( 'uniqueId' => 'Events_Events', 'name' => 'Events', ), 10 => array ( 'uniqueId' => 'Contents_Contents', 'name' => 'Contents', ), 11 => array ( 'uniqueId' => 'UsersFlow_TopPaths', 'name' => 'Top Paths', ), 12 => array ( 'uniqueId' => 'UsersFlow_UsersFlow', 'name' => 'Users Flow', ), ), ), 1 => array ( 'uniqueId' => 'General_Visitors', 'name' => 'Visitors', 'subcategories' => array ( 0 => array ( 'uniqueId' => 'DevicesDetection_Devices', 'name' => 'Devices', ), 1 => array ( 'uniqueId' => 'DevicesDetection_Software', 'name' => 'Software', ), 2 => array ( 'uniqueId' => 'General_Overview', 'name' => 'Overview', ), 3 => array ( 'uniqueId' => 'UserCountry_SubmenuLocations', 'name' => 'Locations', ), 4 => array ( 'uniqueId' => 'VisitTime_SubmenuTimes', 'name' => 'Times', ), 5 => array ( 'uniqueId' => 'UserCountryMap_RealTimeMap', 'name' => 'Real-time Map', ), 6 => array ( 'uniqueId' => 'General_RealTime', 'name' => 'Real-time', ), 7 => array ( 'uniqueId' => 'Live_VisitorLog', 'name' => 'Visits Log', ), 8 => array ( 'uniqueId' => 'CustomVariables_CustomVariables', 'name' => 'Custom Variables', ), 9 => array ( 'uniqueId' => 'UserId_UserReportTitle', 'name' => 'User IDs', ), ), ), 2 => array ( 'uniqueId' => 'Referrers_Referrers', 'name' => 'Acquisition', 'subcategories' => array ( 0 => array ( 'uniqueId' => 'Referrers_WidgetGetAll', 'name' => 'All Channels', ), 1 => array ( 'uniqueId' => 'Referrers_URLCampaignBuilder', 'name' => 'Campaign URL Builder', ), 2 => array ( 'uniqueId' => 'Referrers_Campaigns', 'name' => 'Campaigns', ), 3 => array ( 'uniqueId' => 'General_Overview', 'name' => 'Overview', ), 4 => array ( 'uniqueId' => 'Referrers_SubmenuSearchEngines', 'name' => 'Search Engines & Keywords', ), 5 => array ( 'uniqueId' => 'Referrers_Socials', 'name' => 'Social Networks', ), 6 => array ( 'uniqueId' => 'Referrers_SubmenuWebsitesOnly', 'name' => 'Websites', ), ), ), 3 => array ( 'uniqueId' => 'Goals_Goals', 'name' => 'Goals', 'subcategories' => array ( 0 => array ( 'uniqueId' => '1', 'name' => 'View Photos', ), 1 => array ( 'uniqueId' => '2', 'name' => 'View Videos', ), 2 => array ( 'uniqueId' => 'General_Overview', 'name' => 'Overview', ), 3 => array ( 'uniqueId' => 'MultiChannelConversionAttribution_MultiAttribution', 'name' => 'Multi Attribution', ), ), ), 4 => array ( 'uniqueId' => 'AbTesting_Experiments', 'name' => 'A/B Tests', 'subcategories' => array ( 0 => array ( 'uniqueId' => 'AbTesting_GettingStarted', 'name' => 'Getting started', ), ), ), 5 => array ( 'uniqueId' => 'FormAnalytics_Forms', 'name' => 'Forms', 'subcategories' => array ( 0 => array ( 'uniqueId' => 'FormAnalytics_GettingStarted', 'name' => 'Getting started', ), 1 => array ( 'uniqueId' => 'General_Overview', 'name' => 'Overview', ), 2 => array ( 'uniqueId' => 'FormAnalytics_TypeRealTime', 'name' => 'Real-time', ), ), ), 6 => array ( 'uniqueId' => 'Funnels_Funnels', 'name' => 'Funnels', 'subcategories' => array ( 0 => array ( 'uniqueId' => 'General_Overview', 'name' => 'Overview', ), ), ), 7 => array ( 'uniqueId' => 'HeatmapSessionRecording_Heatmaps', 'name' => 'Heatmaps', 'subcategories' => array ( 0 => array ( 'uniqueId' => 'HeatmapSessionRecording_GettingStarted', 'name' => 'Getting Started', ), ), ), 8 => array ( 'uniqueId' => 'MediaAnalytics_Media', 'name' => 'Media', 'subcategories' => array ( 0 => array ( 'uniqueId' => 'MediaAnalytics_TypeAudienceLog', 'name' => 'Audience Log', ), 1 => array ( 'uniqueId' => 'MediaAnalytics_TypeAudienceMap', 'name' => 'Audience Map', ), 2 => array ( 'uniqueId' => 'MediaAnalytics_TypeAudio', 'name' => 'Audio', ), 3 => array ( 'uniqueId' => 'General_Overview', 'name' => 'Overview', ), 4 => array ( 'uniqueId' => 'MediaAnalytics_MediaPlayers', 'name' => 'Media Players', ), 5 => array ( 'uniqueId' => 'MediaAnalytics_TypeRealTime', 'name' => 'Real-time', ), 6 => array ( 'uniqueId' => 'MediaAnalytics_TypeVideo', 'name' => 'Video', ), ), ), 9 => array ( 'uniqueId' => 'CustomReports_CustomReports', 'name' => 'Custom Reports', 'subcategories' => array ( ), ), );