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