Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Loader\LoaderInterface" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\routing\Loader\AnnotationClassLoader.php:73 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\routing\Loader\AnnotationClassLoader.php on line 73