Fatal error: Uncaught Error: Call to a member function getData() on null in /home/journaluinsgd/public_html/plugins/generic/pdfJsViewer/PdfJsViewerPlugin.inc.php:88 Stack trace: #0 /home/journaluinsgd/public_html/lib/pkp/classes/plugins/HookRegistry.inc.php(107): PdfJsViewerPlugin->submissionCallback() #1 /home/journaluinsgd/public_html/pages/article/ArticleHandler.inc.php(330): HookRegistry::call() #2 /home/journaluinsgd/public_html/lib/pkp/classes/core/PKPRouter.inc.php(397): ArticleHandler->view() #3 /home/journaluinsgd/public_html/lib/pkp/classes/core/PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest() #4 /home/journaluinsgd/public_html/lib/pkp/classes/core/Dispatcher.inc.php(144): PKPPageRouter->route() #5 /home/journaluinsgd/public_html/lib/pkp/classes/core/PKPApplication.inc.php(360): Dispatcher->dispatch() #6 /home/journaluinsgd/public_html/config.php(68): PKPApplication->execute() #7 /home/journaluinsgd/public_html/index.php(29): require('/home/journalui...') #8 {main} thrown in /home/journaluinsgd/public_html/plugins/generic/pdfJsViewer/PdfJsViewerPlugin.inc.php on line 88