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, Jan 18', 'previousPages' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/jobs', 'referrals' => 3, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/best-dive-sites', 'referrals' => 1, )), ), 'currentId' => 1, '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 ( ), 'currentId' => 2, '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' => 5, 'pageviews' => 52, 'entries' => 43, 'exits' => 29, ), 'followingPages' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/jobs', 'referrals' => 5, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/cocos-islands-liveaboard', 'referrals' => 1, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/australia', 'referrals' => 1, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/cayman-islands', 'referrals' => 1, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'divezone.net/diving/cocos-island-costa-rica', 'referrals' => 1, )), 5 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Others', 'referrals' => 8, )), ), 'currentId' => 3, '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' => 'mauritius', 'referrals' => 1, )), ), 'currentId' => 4, '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' => 5, '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' => 6, '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' => 11, 'details' => array ( ), ), 1 => array ( 'label' => 'From Search Engines', 'shortName' => 'search', 'visits' => 19, 'details' => array ( 0 => array ( 'label' => 'Unknown', 'referrals' => '17', ), 1 => array ( 'label' => 'amazon', 'referrals' => '1', ), 2 => array ( 'label' => 'divezone .net', 'referrals' => '1', ), ), ), 2 => array ( 'label' => 'From Websites', 'shortName' => 'website', 'visits' => 7, 'details' => array ( 0 => array ( 'label' => 'http://www.scubadiving.com/tusa-freedom-tri-quest-scuba-diving-mask', 'referrals' => '1', ), 1 => array ( 'label' => 'http://www.scubadiving.com/scubalab-testers-choice-seac-rip-fish-dive-knife', 'referrals' => '1', ), 2 => array ( 'label' => 'http://scubadiverlife.com/gear/gear-review-cressi-medas-lady', 'referrals' => '1', ), 3 => array ( 'label' => 'http://diveadvisor.com/united-kingdom/burnsall', 'referrals' => '1', ), 4 => array ( 'label' => 'Others', 'referrals' => '1', ), ), ), 3 => array ( 'label' => 'From Social Networks', 'shortName' => 'social', 'visits' => 6, 'details' => array ( 0 => array ( 'label' => 'reddit', 'referrals' => '4', ), 1 => array ( 'label' => 'Instagram', 'referrals' => '1', ), 2 => array ( 'label' => 'Facebook', 'referrals' => '1', ), ), ), ), );