I don't have this problem, as it be resolve ?
If not, can you give us:

• You web browser and this version
• Errors and warnings you can get from your inspector

Same here.
When i navigate to e.g. List it still shows the overview (with url https://facebook.github.io/immutable-js/docs/#/List ), but in a new tab.
When i then click again on a List link, in the new tab, the link directs to https://facebook.github.io/List

This seems to be specific for some links, some work properly.

Screenshot of console error attached.
The error comes first when clicking on a broken link.
Latest MacOs Sierra + Latest Chrome 61

Also in the overview, directly after the first error after clicking on List, this additional error is shown, that doesn't say much:

+1. Also in the current Firefox Developer Edition.

edit: Archive Link of the docs if you prefer working links.

All docs broken, indeed ;(

On https://facebook.github.io/immutable-js/docs/#/ using Chrome stable 61.0.3163.79 macOS 10.12.6:

clicking the "List" link in the right sidebar index gives the following console error:
Uncaught Error: Unknown kind undefined at p (Defs.js:341) at Defs.js:315 at Array.reduce (<anonymous>) at p (Defs.js:315) at Defs.js:337 at Array.reduce (<anonymous>) at p (Defs.js:336) at i (Defs.js:268) at r (Defs.js:261) at t.render (Defs.js:52)
and so does OrderedSet, Stack, and maybe more.

Clicking "Map" (and some other links) opens the expanded content as expected. Links that fall under "Map" are working and properly scroll the page to the relevant content.

At one point the href for the links in the sidebar was set to the bare hostname https://facebook.github.io/List instead of https://facebook.github.io/immutable-js/docs/#/List but now I can't seem to replicate it.

+1

I have the same issue:

Defs.js:341 Uncaught Error: Unknown kind undefined at p (Defs.js:341) at Defs.js:315 at Array.reduce (<anonymous>) at p (Defs.js:315) at Defs.js:337 at Array.reduce (<anonymous>) at p (Defs.js:336) at i (Defs.js:268) at r (Defs.js:261) at t.render (Defs.js:52)