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' => 'Mon, Apr 6', '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/best-dive-sites', 'referrals' => 2, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/bonaire', 'referrals' => 2, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/st-kitts-and-nevis', 'referrals' => 2, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/travel/hurghada', 'referrals' => 2, )), 5 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Others', 'referrals' => 41, )), ), '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' => 'andaman', 'referrals' => 1, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'jobs', 'referrals' => 1, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'lanzarote', 'referrals' => 1, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'trabajo', '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' => 16, 'pageviews' => 244, 'entries' => 166, 'exits' => 114, ), 'followingPages' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/jobs', 'referrals' => 38, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/best-dive-sites', 'referrals' => 4, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/red-sea', 'referrals' => 3, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/the-caribbean', 'referrals' => 3, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/liveaboard', 'referrals' => 3, )), 5 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Others', 'referrals' => 57, )), ), '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' => 'andaman', 'referrals' => 1, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'lanzarote', 'referrals' => 1, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'mauritius', 'referrals' => 1, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'trabajo', '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, )), 'outlinks' => Piwik\DataTable::__set_state(array( 'rows' => array ( ), '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 ( ), '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' => 78, 'details' => array ( ), ), 1 => array ( 'label' => 'From Search Engines', 'shortName' => 'search', 'visits' => 48, 'details' => array ( 0 => array ( 'label' => 'to dive or not to dive', 'referrals' => '1', ), 1 => array ( 'label' => 'for the love of the dive', 'referrals' => '1', ), 2 => array ( 'label' => 'diving masks', 'referrals' => '1', ), 3 => array ( 'label' => 'fish in my diving suit', 'referrals' => '1', ), 4 => array ( 'label' => 'Others', 'referrals' => '2', ), ), ), 2 => array ( 'label' => 'From Websites', 'shortName' => 'website', 'visits' => 16, 'details' => array ( 0 => array ( 'label' => 'http://www.emperordivers.com/blog/emperor-superior', 'referrals' => '1', ), 1 => array ( 'label' => 'http://divezone.net/location/indonesia/bali/tulamben', 'referrals' => '1', ), ), ), 3 => array ( 'label' => 'From Social Networks', 'shortName' => 'social', 'visits' => 24, 'details' => array ( 0 => array ( 'label' => 'reddit', 'referrals' => '14', ), 1 => array ( 'label' => 'Facebook', 'referrals' => '4', ), 2 => array ( 'label' => 'Instagram', 'referrals' => '3', ), 3 => array ( 'label' => 'Pinterest', 'referrals' => '2', ), 4 => array ( 'label' => 'Twitter', 'referrals' => '1', ), ), ), ), );