Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractExtension" not found in /var/www/html/demo.ininli.ca/releases/19/vendor/symfony/form/Extension/Core/CoreExtension.php:29 Stack trace: #0 {main} thrown in /var/www/html/demo.ininli.ca/releases/19/vendor/symfony/form/Extension/Core/CoreExtension.php on line 29