Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Loader\LoaderInterface" not found in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\routing\Loader\AnnotationClassLoader.php:57 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\routing\Loader\AnnotationClassLoader.php on line 57