Fatal error: Uncaught Error: Class "Psy\Command\Command" not found in C:\mywamp\sites\allsite\calcomposer\vendor\psy\psysh\src\Command\PsyVersionCommand.php:20 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\psy\psysh\src\Command\PsyVersionCommand.php on line 20