Fatal error: Uncaught Error: Call to a member function getId() on null in /home/u234354444/domains/uinjkt.ac.id/public_html/journal/plugins/blocks/navigation/NavigationBlockPlugin.php:110 Stack trace: #0 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/template/PKPTemplateManager.php(1495): APP\plugins\blocks\navigation\NavigationBlockPlugin->getContents() #1 [internal function]: PKP\template\PKPTemplateManager->displaySidebar() #2 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/plugins/Hook.php(139): call_user_func_array() #3 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/plugins/Hook.php(113): PKP\plugins\Hook::run() #4 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/template/PKPTemplateManager.php(1788): PKP\plugins\Hook::call() #5 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/cache/t_compile/c4befc66d67bd32c2e928d767edffef3064ec10f^4dffb64063bb972c37e05619a2ccd9d0ea7473ac_0.app.frontendcomponentsfooter.tpl.php(29): PKP\template\PKPTemplateManager->smartyCallHook() #6 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): content_691e0264550b97_60881174() #7 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(114): Smarty_Template_Resource_Base->getRenderedTemplateCode() #8 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_template.php(217): Smarty_Template_Compiled->render() #9 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_template.php(386): Smarty_Internal_Template->render() #10 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/cache/t_compile/c4befc66d67bd32c2e928d767edffef3064ec10f^fcbc2cabc0d4dff6219d7e4b5d36c1363533cfd8_0.app.frontendpagesissue.tpl.php(56): Smarty_Internal_Template->_subTemplateRender() #11 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): content_691e026444bdd9_24937695() #12 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(114): Smarty_Template_Resource_Base->getRenderedTemplateCode() #13 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_template.php(217): Smarty_Template_Compiled->render() #14 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(238): Smarty_Internal_Template->render() #15 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(134): Smarty_Internal_TemplateBase->_execute() #16 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/template/PKPTemplateManager.php(1373): Smarty_Internal_TemplateBase->display() #17 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/pages/issue/IssueHandler.php(138): PKP\template\PKPTemplateManager->display() #18 [internal function]: APP\pages\issue\IssueHandler->view() #19 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/core/PKPRouter.php(334): call_user_func() #20 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/core/PKPPageRouter.php(278): PKP\core\PKPRouter->_authorizeInitializeAndCallRequest() #21 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/core/Dispatcher.php(165): PKP\core\PKPPageRouter->route() #22 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/lib/pkp/classes/core/PKPApplication.php(395): PKP\core\Dispatcher->dispatch() #23 /home/u234354444/domains/uinjkt.ac.id/public_html/journal/index.php(21): PKP\core\PKPApplication->execute() #24 {main} thrown in /home/u234354444/domains/uinjkt.ac.id/public_html/journal/plugins/blocks/navigation/NavigationBlockPlugin.php on line 110