Fatal error: Uncaught Error: Call to a member function getId() on string in /www/wwwroot/jurnal.umb.ac.id/public_html/pages/article/ArticleHandler.inc.php:378 Stack trace: #0 /www/wwwroot/jurnal.umb.ac.id/public_html/lib/pkp/classes/core/PKPRouter.inc.php(395): ArticleHandler->downloadSuppFile() #1 /www/wwwroot/jurnal.umb.ac.id/public_html/lib/pkp/classes/core/PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest() #2 /www/wwwroot/jurnal.umb.ac.id/public_html/lib/pkp/classes/core/Dispatcher.inc.php(144): PKPPageRouter->route() #3 /www/wwwroot/jurnal.umb.ac.id/public_html/lib/pkp/classes/core/PKPApplication.inc.php(362): Dispatcher->dispatch() #4 /www/wwwroot/jurnal.umb.ac.id/public_html/index.php(67): PKPApplication->execute() #5 {main} thrown in /www/wwwroot/jurnal.umb.ac.id/public_html/pages/article/ArticleHandler.inc.php on line 378