Fatal error: Uncaught RuntimeException: Failed to start the session because headers have already been sent by "/var/www/html/src/OFSA/VegetalisationBundle/Entity/EspeceDescription.php" at line 383. in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php:151 Stack trace: #0 /var/www/html/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Session.php(55): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() #1 /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Security/Csrf/TokenStorage/SessionTokenStorage.php(78): Symfony\Component\HttpFoundation\Session\Session->start() #2 /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Security/Csrf/CsrfTokenManager.php(72): Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage->hasToken('filtre_vegetali...') #3 /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Form/Extension/Csrf/Type/FormTypeCsrfExtension.php(106): Symfony\Component\Security\Cs in /var/www/html/src/OFSA/OFSABundle/Resources/views/include/_connexion.html.twig on line 32