notedown默认启动失败

[hellomx]

jupyter_notebook_config.py最后添加
c.NotebookApp.contents_manager_class = ‘notedown.NotedownContentsManager’
打开Jupyter就闪退了，请教大神如何处理
windows系统，另外这个新生成的jupyter_notebook_config.py配置文件都是注释的