Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\Loader" not found in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\routing\Loader\ClosureLoader.php:24 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\routing\Loader\ClosureLoader.php on line 24