Fatal error: Uncaught Error: Call to a member function getData() on null in /www/wwwroot/jurnal/ojs3.4/plugins/generic/htmlArticleGalley/HtmlArticleGalleyPlugin.php:132 Stack trace: #0 [internal function]: APP\plugins\generic\htmlArticleGalley\HtmlArticleGalleyPlugin->articleDownloadCallback() #1 /www/wwwroot/jurnal/ojs3.4/lib/pkp/classes/plugins/Hook.php(139): call_user_func_array() #2 /www/wwwroot/jurnal/ojs3.4/lib/pkp/classes/plugins/Hook.php(113): PKP\plugins\Hook::run() #3 /www/wwwroot/jurnal/ojs3.4/pages/article/ArticleHandler.php(483): PKP\plugins\Hook::call() #4 [internal function]: APP\pages\article\ArticleHandler->download() #5 /www/wwwroot/jurnal/ojs3.4/lib/pkp/classes/core/PKPRouter.php(334): call_user_func() #6 /www/wwwroot/jurnal/ojs3.4/lib/pkp/classes/core/PKPPageRouter.php(278): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #7 /www/wwwroot/jurnal/ojs3.4/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route() #8 /www/wwwroot/jurnal/ojs3.4/lib/pkp/classes/core/PKPApplication.php(395): PKP\core\Dispatcher->dispatch() #9 /www/wwwroot/jurnal/ojs3.4/index.php(21): PKP\core\PKPApplication->execute() #10 {main} thrown in /www/wwwroot/jurnal/ojs3.4/plugins/generic/htmlArticleGalley/HtmlArticleGalleyPlugin.php on line 132