Fatal error: Uncaught Error: Class 'Guzzle\Plugin\Mock\MockPlugin' not found in /home/app/htdocs/ninja/vendor/rackspace/php-opencloud/tests/OpenCloud/Tests/MockSubscriber.php:26 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/rackspace/php-opencloud/tests/OpenCloud/Tests/MockSubscriber.php on line 26