Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Loader\FileLoader" not found in I:\www\picman\vendor\symfony\dependency-injection\Loader\YamlFileLoader.php:41 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\dependency-injection\Loader\YamlFileLoader.php on line 41