Fatal error: Uncaught Error: Interface 'Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface' not found in /home/almasai/www/people/_old_site/vendor/symfony/src/Symfony/Component/DependencyInjection/Compiler/MergeExtensionConfigurationPass.php:21 Stack trace: #0 {main} thrown in /home/almasai/www/people/_old_site/vendor/symfony/src/Symfony/Component/DependencyInjection/Compiler/MergeExtensionConfigurationPass.php on line 21