Fatal error: Uncaught Error: Class 'OpenCloud\Common\PersistentObject' not found in /home/app/htdocs/ninja/vendor/rackspace/php-opencloud/lib/OpenCloud/Compute/Resource/VolumeAttachment.php:27 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/rackspace/php-opencloud/lib/OpenCloud/Compute/Resource/VolumeAttachment.php on line 27