Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractType" not found in /home/u6668910/public_html/lab/src/Admin/ResearchBundle/Form/ResearchType.php:9 Stack trace: #0 {main} thrown in /home/u6668910/public_html/lab/src/Admin/ResearchBundle/Form/ResearchType.php on line 9