Fatal error: Uncaught Error: Call to a member function getAccessStatus() on null in /var/www/ojs/classes/issue/IssueAction.inc.php:35 Stack trace: #0 /var/www/ojs/classes/search/ArticleSearch.inc.php(274): IssueAction->subscriptionRequired(NULL, Object(Journal)) #1 /var/www/ojs/plugins/generic/recommendByAuthor/RecommendByAuthorPlugin.inc.php(142): ArticleSearch->formatResults(Array) #2 /var/www/ojs/lib/pkp/classes/plugins/HookRegistry.inc.php(107): RecommendByAuthorPlugin->callbackTemplateArticlePageFooter('Templates::Arti...', Array) #3 /var/www/ojs/lib/pkp/classes/template/PKPTemplateManager.inc.php(1256): HookRegistry::call('Templates::Arti...', Array) #4 /var/www/ojs/cache/t_compile/42362804174f266c598cdb32c3208fc745b92101^1c372c95cd85572e0fbc9a53d0323a0b229cfc78_0.app.frontendpagesarticle.tpl.php(43): PKPTemplateManager->smartyCallHook(Array, Object(Smarty_Internal_Template)) #5 /var/www/ojs/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): content_607d604ce92507_70739181(Objec in /var/www/ojs/classes/issue/IssueAction.inc.php on line 35