Fatal error: Uncaught Error: Interface "Symfony\Component\Form\FormExtensionInterface" not found in /home/projetwewv/www/licence00/monapp/vendor/symfony/form/AbstractExtension.php:20 Stack trace: #0 {main} thrown in /home/projetwewv/www/licence00/monapp/vendor/symfony/form/AbstractExtension.php on line 20