Fatal error: Uncaught Error: Class "Symfony\Component\Console\Command\Command" not found in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\yaml\Command\LintCommand.php:32 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\yaml\Command\LintCommand.php on line 32