### Working through the Sage tutorial in a notebook error.

The Sage tutorial says:

or from the Sage notebook (click Help, then click Tutorial to interactively work through the tutorial from within Sage).

but when I follow those directions I get:
```
404 : Not Found

You are requesting a page that does not exist!
```

The url in the new tab that appears is:

```
http://localhost:8888/kernelspecs/sagemath/doc/tutorial/index.html?v=20210430004223
```

And the notebook server shows:

` `

```
```
[W 08:24:19.246 NotebookApp] 404 GET /kernelspecs/sagemath/doc/tutorial/index.html?v=20210430004223
```

` `

```
(127.0.0.1) 19.26ms referer=http://localhost:8888/notebooks/Untitled2.ipynb
```

```

What am I doing wrong?

```