Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface" not found in /var/www/html/festival/vendor/symfony/dependency-injection/Compiler/ExtensionCompilerPass.php:22 Stack trace: #0 {main} thrown in /var/www/html/festival/vendor/symfony/dependency-injection/Compiler/ExtensionCompilerPass.php on line 22