Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in /home/iotechtniu/ioacademy/vendor/symfony/security-bundle/DependencyInjection/SecurityExtension.php:61 Stack trace: #0 {main} thrown in /home/iotechtniu/ioacademy/vendor/symfony/security-bundle/DependencyInjection/SecurityExtension.php on line 61