Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Loader\FileLoader' not found in C:\SistemasPHP\observatorio4\vendor\symfony\dependency-injection\Loader\FileLoader.php:30 Stack trace: #0 {main} thrown in C:\SistemasPHP\observatorio4\vendor\symfony\dependency-injection\Loader\FileLoader.php on line 30