Angularjs karma opera启动器未提供此类文件或指令。/config/prefs.ini错误

在运行

karma start test/karma.conf.js

之后，我遇到了这个错误：

WARN [launcher]: Can not load "Opera", it is not registered!
  Perhaps you are missing some plugin?

似乎是因为这个错误：

WARN [plugin]: Error during loading "/usr/local/lib/node_modules/karma-opera-launcher" plugin:
  ENOENT, no such file or directory './config/prefs.ini'

全输出：

~/code/simulated-selves $ karma start test/karma.conf.js
WARN [plugin]: Error during loading "/usr/local/lib/node_modules/karma-opera-launcher" plugin:
  ENOENT, no such file or directory './config/prefs.ini'
WARN [preprocess]: Can not load "ng-html2js", it is not registered!
  Perhaps you are missing some plugin?
INFO [karma]: Karma v0.12.37 server started at http://localhost:9876/
INFO [launcher]: Starting browser Chrome
INFO [launcher]: Starting browser Firefox
INFO [launcher]: Starting browser Safari
WARN [launcher]: Can not load "Opera", it is not registered!
  Perhaps you are missing some plugin?
INFO [Safari 8.0.7 (Mac OS X 10.10.4)]: Connected on socket 7E_R6dTRtbdOIjPkKqiF with id 7465598
INFO [Chrome 43.0.2357 (Mac OS X 10.10.4)]: Connected on socket AxabWkNzGr4EcGn9KqiG with id 52528925
INFO [Firefox 39.0.0 (Mac OS X 10.10.0)]: Connected on socket jGDy5qBGHsLPo8h6KqiH with id 72018902
Safari 8.0.7 (Mac OS X 10.10.4): Executed 1 of 1 SUCCESS (0.017 secs / 0.014 secs)
Firefox 39.0.0 (Mac OS X 10.10.0): Executed 1 of 1 SUCCESS (0.029 secs / 0.026 secs)
Chrome 43.0.2357 (Mac OS X 10.10.4): Executed 1 of 1 SUCCESS (0.045 secs / 0.042 secs)
TOTAL: 3 SUCCESS

为什么会发生这种情况？我能做些什么

我已经成功运行了

npm安装karma opera launcher——保存dev

。我的电脑上安装了Opera，它可以正常工作

编辑-更多详细信息：

• 我正在使用MacOSX10.10.4
• 当我在运行

  karma start test/karma.conf.js

  之前打开Opera时，我会遇到同样的问题
• 我试着运行

  npm update

  和

  npm update-g

  以及更新节点，但都不起作用

---

这似乎是一个已知的问题