Fatal error: Uncaught Error: Class 'OpenCloud\Common\Resource\PersistentResource' not found in /home/app/htdocs/lidia/vendor/rackspace/php-opencloud/lib/OpenCloud/Database/Resource/Backup.php:28 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/rackspace/php-opencloud/lib/OpenCloud/Database/Resource/Backup.php on line 28