Preliminares

Fatal error: Uncaught Error: Call to a member function getJournalId() on null in /var/www/sena-ojs/classes/issue/IssueAction.inc.php:31 Stack trace: #0 /var/www/sena-ojs/classes/search/ArticleSearch.inc.php(274): IssueAction->subscriptionRequired(NULL, Object(Journal)) #1 /var/www/sena-ojs/plugins/generic/recommendByAuthor/RecommendByAuthorPlugin.inc.php(142): ArticleSearch->formatResults(Array) #2 /var/www/sena-ojs/lib/pkp/classes/plugins/HookRegistry.inc.php(107): RecommendByAuthorPlugin->callbackTemplateArticlePageFooter('Templates::Arti...', Array) #3 /var/www/sena-ojs/lib/pkp/classes/template/PKPTemplateManager.inc.php(1518): HookRegistry::call('Templates::Arti...', Array) #4 /var/www/sena-ojs/cache/t_compile/93b4f13326abf2c920de729fdcdace1580d9bcb7^addd65021fadf964339ab08cd1aa93ba59b14e9c_0.app.frontendobjectsarticledet.php(573): PKPTemplateManager->smartyCallHook(Array, Object(Smarty_Internal_Template)) #5 /var/www/sena-ojs/lib/pkp/lib/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): con in /var/www/sena-ojs/classes/issue/IssueAction.inc.php on line 31