Gruntjs Grunt可以加载但不能运行任务

软件包安装正确，但无法运行默认任务。我有grunt和npm的最新版本。这是grunt default--verbose的输出

  Initializing
Command-line options: --verbose

Reading "Gruntfile.js" Gruntfile...OK

Registering Gruntfile tasks.
Reading package.json...OK
Parsing package.json...OK
Initializing config...OK

Registering "grunt-contrib-less" local Npm module tasks.
Reading /Users/xxx/Git/x/web/node_modules/grunt-contrib-less/package.json...OK
Parsing /Users/xxx/Git/x/web/node_modules/grunt-contrib-less/package.json...OK
Loading "less.js" tasks...OK
+ less
Loading "Gruntfile.js" tasks...OK
+ default

Running tasks: default

Running "default" task
Warning: Task "grunt-contrib-less" not found. Use --force to continue.

Aborted due to warnings.

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如何解决此问题？

任务需要简单地

less:{…

而不是

grunt contrib less:{…

如下所示：

---

查看GrunFile可能会有所帮助，但我猜减少任务的关键是：

grunt contrib less:{…

，而不是简单地

less:{…

。请参阅。是的，这就是问题所在！将注释作为答案发布。谢谢。

less: {
  development: {
    options: {
      paths: ["assets/css"]
    },
    files: {
      "path/to/result.css": "path/to/source.less"
    }
  }
}