Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Dumper\DumperInterface" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\dependency-injection\Dumper\Dumper.php:21 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\dependency-injection\Dumper\Dumper.php on line 21