Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Loader\FileLoader' not found in D:\workspaces\liZiPingBack\vendor\symfony\config\Loader\GlobFileLoader.php:19 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\config\Loader\GlobFileLoader.php on line 19