Fatal error: Uncaught Error: Class 'Symfony\Component\Form\AbstractExtension' not found in /home/itscm/dev.its.cm/webserivesits/vendor/symfony/form/Extension/Core/CoreExtension.php:30 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/webserivesits/vendor/symfony/form/Extension/Core/CoreExtension.php on line 30