Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface" not found in E:\www\frey\qgmvc\v1.0\composer\vendor\symfony\cache\DependencyInjection\CachePoolClearerPass.php:21 Stack trace: #0 {main} thrown in E:\www\frey\qgmvc\v1.0\composer\vendor\symfony\cache\DependencyInjection\CachePoolClearerPass.php on line 21