Jupyter Notebook: '_xsrf' argument missing from POST 解决方案

问题描述： 在Jupyter Notebook里跑了几天的代码，notebook右上角突然显示’_xsrf’ argument missing from POST，无法保存现有file也无法stop 或 run cell。命令行显示报错信息如下：

[W 02:50:17.848 NotebookApp] '_xsrf' argument missing from POST
[W 02:50:17.849 NotebookApp] 403 PUT /api/contents/Untitled.ipynb (::1) 2.29ms referer=http://localhost:8888/notebooks/Untitled.ipynb?kernel_name=python3

在启动页new file出现下图报错：

解决方案： 刷新启动页 http://localhost:8888/tree/[yourAddress] 即可

可能原因： I put my computer on sleep and did not use it for a few hours after running code for days. Refreshing localhost helps to get the Jupyter Server up.

参考： https://github.com/nteract/hydrogen/issues/922