Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractType" not found in /home/zdpktgd/ptc/src/Form/FormType/Chantiers/NouveauAvenantFormType.php:17 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/src/Form/FormType/Chantiers/NouveauAvenantFormType.php on line 17