Fatal error: Uncaught Error: Call to a member function getData() on null in /home/soranedu/public_html/journals/classes/search/ArticleSearch.php:288 Stack trace: #0 /home/soranedu/public_html/journals/plugins/generic/recommendByAuthor/RecommendByAuthorPlugin.php(160): APP\search\ArticleSearch->formatResults() #1 [internal function]: APP\plugins\generic\recommendByAuthor\RecommendByAuthorPlugin->callbackTemplateArticlePageFooter() #2 /home/soranedu/public_html/journals/lib/pkp/classes/plugins/Hook.php(139): call_user_func_array() #3 /home/soranedu/public_html/journals/lib/pkp/classes/plugins/Hook.php(113): PKP\plugins\Hook::run() #4 /home/soranedu/public_html/journals/lib/pkp/classes/template/PKPTemplateManager.php(1740): PKP\plugins\Hook::call() #5 /home/soranedu/public_html/journals/cache/t_compile/42362804174f266c598cdb32c3208fc745b92101^1c372c95cd85572e0fbc9a53d0323a0b229cfc78_0.app.frontendpagesarticle.tpl.php(43): PKP\template\PKPTemplateManager->smartyCallHook() #6 /home/soranedu/public_html/journals/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): content_69692f749c06a3_13370603() #7 /home/soranedu/public_html/journals/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(114): Smarty_Template_Resource_Base->getRenderedTemplateCode() #8 /home/soranedu/public_html/journals/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_template.php(217): Smarty_Template_Compiled->render() #9 /home/soranedu/public_html/journals/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(238): Smarty_Internal_Template->render() #10 /home/soranedu/public_html/journals/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(134): Smarty_Internal_TemplateBase->_execute() #11 /home/soranedu/public_html/journals/lib/pkp/classes/template/PKPTemplateManager.php(1325): Smarty_Internal_TemplateBase->display() #12 /home/soranedu/public_html/journals/pages/article/ArticleHandler.php(355): PKP\template\PKPTemplateManager->display() #13 [internal function]: APP\pages\article\ArticleHandler->view() #14 /home/soranedu/public_html/journals/lib/pkp/classes/core/PKPRouter.php(334): call_user_func() #15 /home/soranedu/public_html/journals/lib/pkp/classes/core/PKPPageRouter.php(277): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #16 /home/soranedu/public_html/journals/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route() #17 /home/soranedu/public_html/journals/lib/pkp/classes/core/PKPApplication.php(387): PKP\core\Dispatcher->dispatch() #18 /home/soranedu/public_html/journals/index.php(21): PKP\core\PKPApplication->execute() #19 {main} thrown in /home/soranedu/public_html/journals/classes/search/ArticleSearch.php on line 288