Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractExtension" not found in /var/www/html/immobilier-des-particuliers.fr/vendor/symfony/form/Extension/Csrf/CsrfExtension.php:23 Stack trace: #0 {main} thrown in /var/www/html/immobilier-des-particuliers.fr/vendor/symfony/form/Extension/Csrf/CsrfExtension.php on line 23