Fatal error: Uncaught Error: Class "APP\handler\Handler" not found in /home/dominiodelascien/public_html/ojs/plugins/pkp-clamav-master/ClamavVersionHandler.php:29 Stack trace: #0 {main} thrown in /home/dominiodelascien/public_html/ojs/plugins/pkp-clamav-master/ClamavVersionHandler.php on line 29