Symfony 3 - 找不到cssrewrite过滤器

Question

我没有得到它 - 我已经设置了一些symfony项目，但现在我完全迷失了错误信息：

contains an error: There is no "cssrewrite" filter.

作曲家：

"require": {
    "php": ">=5.5.9",
    "symfony/symfony": "3.1.*",
    "symfony/monolog-bundle": "^2.8",
    "symfony/polyfill-apcu": "^1.0",
    "sensio/distribution-bundle": "^5.0",
    "sensio/framework-extra-bundle": "^3.0.2",
    "incenteev/composer-parameter-handler": "^2.0",
    "ircmaxell/password-compat": "^1.0",
    "nelsonkopliku/twig-exception": "0.*",
    "predis/predis": "^1.1",
    "symfony/assetic-bundle": "2.8"
},

应用程序/配置/ config.yml

assetic:
  debug:          "%kernel.debug%"
  use_controller: false
  bundles:        [ 'oneBundle', 'anotherBundle' ]
  #java: /usr/bin/java
  filters:
    uglifyjs:
      bin: /usr/local/bin/uglifyjs
    uglifycss:
      bin: /usr/local/bin/uglifycss
    less:
      node: "/usr/local/bin/node"
      node_paths: [/usr/local/lib/node_modules/]
    cssrewrite: ~

在模板中：

{% stylesheets
    'assets/vendor/bootstrap/dist/css/bootstrap.css'
    'assets/vendor/font-awesome/css/font-awesome.css'
  filter="cssrewrite,?uglifycss" %}
    <link href="{{ asset_url }}" rel="stylesheet" />
{% endstylesheets %}

如果删除cssrewrite，uglifycss过滤器可以正常工作。 也作为交叉检查 - 我从配置中删除了uglifycss，然后它抱怨丢失的过滤器。

关于我如何解决这个问题的任何想法？