Fatal error: Uncaught Error: Call to a member function getDateChanged() on null in /www/wwwroot/inlibrary.uz/plugins/generic/journalsPublisher/JournalsPublisherHandler.php:359 Stack trace: #0 [internal function]: APP\plugins\generic\journalsPublisher\JournalsPublisherHandler->view() #1 /www/wwwroot/inlibrary.uz/lib/pkp/classes/core/PKPRouter.php(334): call_user_func() #2 /www/wwwroot/inlibrary.uz/lib/pkp/classes/core/PKPPageRouter.php(278): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #3 /www/wwwroot/inlibrary.uz/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route() #4 /www/wwwroot/inlibrary.uz/lib/pkp/classes/core/PKPApplication.php(395): PKP\core\Dispatcher->dispatch() #5 /www/wwwroot/inlibrary.uz/index.php(114): PKP\core\PKPApplication->execute() #6 {main} thrown in /www/wwwroot/inlibrary.uz/plugins/generic/journalsPublisher/JournalsPublisherHandler.php on line 359