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 ( 'date' => 'Sun, Feb 16', 'previousPages' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/jobs', 'referrals' => 9, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/maldives', 'referrals' => 6, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/indonesia', 'referrals' => 5, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/thailand', 'referrals' => 4, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/resumes/register', 'referrals' => 4, )), 5 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Others', 'referrals' => 72, )), ), 'currentId' => NULL, 'depthLevel' => 0, 'indexNotUpToDate' => true, 'rebuildIndexContinuously' => false, 'tableSortedBy' => false, 'queuedFilters' => array ( ), 'disabledFilters' => array ( ), 'rowsCountBeforeLimitFilter' => 0, 'enableRecursiveSort' => false, 'enableRecursiveFilters' => false, 'rowsIndexByLabel' => array ( ), 'summaryRow' => NULL, 'totalsRow' => NULL, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'previousSiteSearches' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'jobs', 'referrals' => 1, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Okinawa', 'referrals' => 1, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'russian', 'referrals' => 1, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'sofnolime', 'referrals' => 1, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'switzerland', 'referrals' => 1, )), ), 'currentId' => NULL, 'depthLevel' => 0, 'indexNotUpToDate' => true, 'rebuildIndexContinuously' => false, 'tableSortedBy' => false, 'queuedFilters' => array ( ), 'disabledFilters' => array ( ), 'rowsCountBeforeLimitFilter' => 0, 'enableRecursiveSort' => false, 'enableRecursiveFilters' => false, 'rowsIndexByLabel' => array ( ), 'summaryRow' => NULL, 'totalsRow' => NULL, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'pageMetrics' => array ( 'loops' => 23, 'pageviews' => 330, 'entries' => 202, 'exits' => 137, ), 'followingPages' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/jobs', 'referrals' => 48, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/indonesia', 'referrals' => 7, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/thailand', 'referrals' => 6, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/best-dive-sites', 'referrals' => 5, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/maldives', 'referrals' => 5, )), 5 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Others', 'referrals' => 88, )), ), 'currentId' => NULL, 'depthLevel' => 0, 'indexNotUpToDate' => true, 'rebuildIndexContinuously' => false, 'tableSortedBy' => false, 'queuedFilters' => array ( ), 'disabledFilters' => array ( ), 'rowsCountBeforeLimitFilter' => 0, 'enableRecursiveSort' => false, 'enableRecursiveFilters' => false, 'rowsIndexByLabel' => array ( ), 'summaryRow' => NULL, 'totalsRow' => NULL, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'followingSiteSearches' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'jobs', 'referrals' => 2, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'osaka', 'referrals' => 2, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Jobs', 'referrals' => 1, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Ningaloo', 'referrals' => 1, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Similan islands', 'referrals' => 1, )), 5 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Others', 'referrals' => 4, )), ), 'currentId' => NULL, 'depthLevel' => 0, 'indexNotUpToDate' => true, 'rebuildIndexContinuously' => false, 'tableSortedBy' => false, 'queuedFilters' => array ( ), 'disabledFilters' => array ( ), 'rowsCountBeforeLimitFilter' => 0, 'enableRecursiveSort' => false, 'enableRecursiveFilters' => false, 'rowsIndexByLabel' => array ( ), 'summaryRow' => NULL, 'totalsRow' => NULL, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'outlinks' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'http://facebook.com/Divezone.net', 'referrals' => 1, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'https://www.liveaboard.com/diving/search/australia/?cid=7000', 'referrals' => 1, )), ), 'currentId' => NULL, 'depthLevel' => 0, 'indexNotUpToDate' => true, 'rebuildIndexContinuously' => false, 'tableSortedBy' => false, 'queuedFilters' => array ( ), 'disabledFilters' => array ( ), 'rowsCountBeforeLimitFilter' => 0, 'enableRecursiveSort' => false, 'enableRecursiveFilters' => false, 'rowsIndexByLabel' => array ( ), 'summaryRow' => NULL, 'totalsRow' => NULL, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'downloads' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'http://divezone.net/wp-content/uploads/2012/11/advertise-240x400..jpg', 'referrals' => 1, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'http://divezone.net/wp-content/uploads/2012/11/advertise-300x250.jpg', 'referrals' => 1, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'http://divezone.net/wp-content/uploads/2012/11/advertise-728x90.jpg', 'referrals' => 1, )), ), 'currentId' => NULL, 'depthLevel' => 0, 'indexNotUpToDate' => true, 'rebuildIndexContinuously' => false, 'tableSortedBy' => false, 'queuedFilters' => array ( ), 'disabledFilters' => array ( ), 'rowsCountBeforeLimitFilter' => 0, 'enableRecursiveSort' => false, 'enableRecursiveFilters' => false, 'rowsIndexByLabel' => array ( ), 'summaryRow' => NULL, 'totalsRow' => NULL, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'referrers' => array ( 0 => array ( 'label' => 'Direct Entries', 'shortName' => 'direct', 'visits' => 80, 'details' => array ( ), ), 1 => array ( 'label' => 'From Search Engines', 'shortName' => 'search', 'visits' => 71, 'details' => array ( 0 => array ( 'label' => 'diving scuba reviews', 'referrals' => '2', ), 1 => array ( 'label' => 'amazon', 'referrals' => '2', ), 2 => array ( 'label' => 'where to dive in june', 'referrals' => '2', ), 3 => array ( 'label' => 'where can i buy diving things', 'referrals' => '1', ), 4 => array ( 'label' => 'Others', 'referrals' => '5', ), ), ), 2 => array ( 'label' => 'From Websites', 'shortName' => 'website', 'visits' => 21, 'details' => array ( 0 => array ( 'label' => 'http://diveadvisor.com/', 'referrals' => '1', ), 1 => array ( 'label' => 'http://scubadiverlife.com/page/2', 'referrals' => '1', ), 2 => array ( 'label' => 'http://scubadiverlife.com/category/blog/training/', 'referrals' => '1', ), 3 => array ( 'label' => 'http://diveadvisor.com/united-kingdom/reviews', 'referrals' => '1', ), 4 => array ( 'label' => 'Others', 'referrals' => '2', ), ), ), 3 => array ( 'label' => 'From Social Networks', 'shortName' => 'social', 'visits' => 30, 'details' => array ( 0 => array ( 'label' => 'reddit', 'referrals' => '15', ), 1 => array ( 'label' => 'Twitter', 'referrals' => '5', ), 2 => array ( 'label' => 'Pinterest', 'referrals' => '4', ), 3 => array ( 'label' => 'Instagram', 'referrals' => '4', ), 4 => array ( 'label' => 'Facebook', 'referrals' => '2', ), ), ), ), );