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' => 'Sat, Oct 21', 'previousPages' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/t/how-do-i-remove-the-income-item/25929', 'referrals' => 1, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/t/version-3-2-referring-url-no-longer-recorded/26011', 'referrals' => 1, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/t/wordpress-plugin-where-is-my-auth-token/4200', 'referrals' => 1, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/t/robot-greetings/25921', 'referrals' => 1, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/t/set-campaign-name-in-javascript--paq-push-instead-of-a-url-parameter/26017', '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, '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, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'pageMetrics' => array ( 'loops' => 4, 'pageviews' => 18, 'entries' => 9, 'exits' => 4, ), 'followingPages' => Piwik\DataTable::__set_state(array( 'rows' => array ( 0 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/c/general-questions', 'referrals' => 3, )), 1 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/c/support-en-francais', 'referrals' => 1, )), 2 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/t/new-segment-editor-available-in-piwik-3-2-0-beta/25871', 'referrals' => 1, )), 3 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/c/supporto-in-italiano', 'referrals' => 1, )), 4 => Piwik\DataTable\Row::__set_state(array( 'label' => 'forum.piwik.org/t/set-campaign-name-in-javascript--paq-push-instead-of-a-url-parameter/26017', 'referrals' => 1, )), 5 => Piwik\DataTable\Row::__set_state(array( 'label' => 'Others', 'referrals' => 3, )), ), 'currentId' => 3, 'depthLevel' => 0, 'indexNotUpToDate' => true, 'rebuildIndexContinuously' => false, 'tableSortedBy' => false, 'queuedFilters' => array ( ), 'disabledFilters' => array ( ), 'rowsCountBeforeLimitFilter' => 0, 'enableRecursiveSort' => false, 'enableRecursiveFilters' => false, 'rowsIndexByLabel' => array ( ), 'summaryRow' => NULL, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'followingSiteSearches' => Piwik\DataTable::__set_state(array( 'rows' => array ( ), 'currentId' => 4, 'depthLevel' => 0, 'indexNotUpToDate' => true, 'rebuildIndexContinuously' => false, 'tableSortedBy' => false, 'queuedFilters' => array ( ), 'disabledFilters' => array ( ), 'rowsCountBeforeLimitFilter' => 0, 'enableRecursiveSort' => false, 'enableRecursiveFilters' => false, 'rowsIndexByLabel' => array ( ), 'summaryRow' => 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, '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, 'metadata' => array ( ), 'maximumAllowedRows' => 0, )), 'referrers' => array ( 0 => array ( 'label' => 'Direct Entries', 'shortName' => 'direct', 'visits' => 1, 'details' => array ( ), ), 1 => array ( 'label' => 'From Search Engines', 'shortName' => 'search', 'visits' => 1, 'details' => array ( ), ), 2 => array ( 'label' => 'From Websites', 'shortName' => 'website', 'visits' => 7, 'details' => array ( 0 => array ( 'label' => 'https://piwik.org/faq/', 'referrals' => '1', ), 1 => array ( 'label' => 'http://www.somsaun.com:4229/CMD_PLUGINS/installatron/index.raw', 'referrals' => '1', ), 2 => array ( 'label' => 'https://piwik.org/faq/media-analytics/', 'referrals' => '1', ), 3 => array ( 'label' => 'https://piwik.org/blog/2017/04/tracking-user-acquisition-social-media-activity-piwik/', 'referrals' => '1', ), 4 => array ( 'label' => 'https://www.timer4web.com/', 'referrals' => '1', ), 5 => array ( 'label' => 'Others', 'referrals' => '2', ), ), ), ), );