Fatal error: Uncaught Error: Interface "Pheanstalk\Contract\CommandInterface" not found in E:\www\xmvc\v5.0\composer\vendor\pda\pheanstalk\src\Command\ListTubesWatchedCommand.php:21 Stack trace: #0 {main} thrown in E:\www\xmvc\v5.0\composer\vendor\pda\pheanstalk\src\Command\ListTubesWatchedCommand.php on line 21