Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractExtension" not found in I:\www\picman\vendor\symfony\form\Extension\PasswordHasher\PasswordHasherExtension.php:22 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\form\Extension\PasswordHasher\PasswordHasherExtension.php on line 22