Fatal error: Uncaught Error: Class "Symfony\Bundle\FrameworkBundle\Controller\AbstractController" not found in /home/assluvdesk/public_html/vendor/uvdesk/mailbox-component/Controller/MailboxChannelXHR.php:14 Stack trace: #0 {main} thrown in /home/assluvdesk/public_html/vendor/uvdesk/mailbox-component/Controller/MailboxChannelXHR.php on line 14