我尝试按照描述安装SonataMediaBundlehere.安装后出现此错误:PHPFatalerror:Interface'Sonata\CoreBundle\Model\ManagerInterface'notfoundin/var/www/prj/vendor/sonata-project/media-bundle/Sonata/MediaBundle/Model/MediaManagerInterface.phponline20有Sonata\CoreBundle\Entity\ManagerInterface但没有Sonata\CoreBundle\Model\Manage