Oneup flysystem和liip imagine本地缓存设置

Question

我在项目根目录外有一个文件夹，其中包含上传的图像，现在我想通过使用oneup flysystem将Liip imagine缓存存储为wel。

config.yml

liip_imagine:
    resolver:
        upload_adapter:
            flysystem:
                filesystem_service: oneup_flysystem.profile_photos_filesystem
                root_url:           "http://images.example.com"
                cache_prefix:       media/cache
                visibility:         public

    filter_sets:
        cache: ~
        thumb:
            quality: 75
            filters:
                thumbnail: { size: [120, 90], mode: outbound }
        large:
            quality: 75
            filters:
                thumbnail: { size: [800, 600], mode: outbound }
    loaders:
        default:
            filesystem:
                data_root: "%upload_file_path%"

oneup_flysystem:
    adapters:
        upload_adapter:
            local:
                directory: "%upload_file_path%"

    filesystems:
        deliva_filesystem:
            adapter: upload_adapter

但它一直给我这个错误：

​