Fatal error: Uncaught Error: Class "Symfony\Bundle\FrameworkBundle\Controller\Controller" not found in /home/u6668910/public_html/lab/src/Admin/ResearchBundle/Controller/ResearchController.php:15 Stack trace: #0 {main} thrown in /home/u6668910/public_html/lab/src/Admin/ResearchBundle/Controller/ResearchController.php on line 15