Fatal error: Uncaught Error: Class 'Symfony\Component\Form\AbstractTypeExtension' not found in /home/aucoeurdgw/dev/src/PrestaShopBundle/Form/Admin/Extension/HelpTextExtension.php:38 Stack trace: #0 {main} thrown in /home/aucoeurdgw/dev/src/PrestaShopBundle/Form/Admin/Extension/HelpTextExtension.php on line 38