Fatal error: Uncaught Error: Call to a member function getData() on null in /home/journals/sites/journals/classes/plugins/PubIdPlugin.inc.php:244 Stack trace: #0 /home/journals/sites/journals/plugins/pubIds/doi/DOIPubIdPlugin.inc.php(70): PubIdPlugin->isExcluded(NULL) #1 /home/journals/sites/journals/cache/t_compile/%%28^280^280EE005%%dublincore.tpl.php(179): DOIPubIdPlugin->getPubId(NULL) #2 /home/journals/sites/journals/lib/pkp/lib/smarty/Smarty.class.php(1876): include('/home/journals/...') #3 /home/journals/sites/journals/lib/pkp/classes/template/PKPTemplateManager.inc.php(217): Smarty->_smarty_include(Array) #4 /home/journals/sites/journals/cache/t_compile/%%35^350^3508C2FA%%header.tpl.php(82): PKPTemplateManager->_smarty_include(Array) #5 /home/journals/sites/journals/lib/pkp/lib/smarty/Smarty.class.php(1876): include('/home/journals/...') #6 /home/journals/sites/journals/lib/pkp/classes/template/PKPTemplateManager.inc.php(217): Smarty->_smarty_include(Array) #7 /home/journals/sites/journals/cache/t_compile/%%38^38D in /home/journals/sites/journals/classes/plugins/PubIdPlugin.inc.php on line 244