Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\EnvVarLoaderInterface" not found in /home/congngyh/pgairdc.org/vendor2/symfony/dependency-injection/StaticEnvVarLoader.php:14 Stack trace: #0 {main} thrown in /home/congngyh/pgairdc.org/vendor2/symfony/dependency-injection/StaticEnvVarLoader.php on line 14