Clicking on the Read the Docs link under the section Documentation at https://immutable-js.github.io/immutable-js/docs/#/ leads to "Page not found error"

The Docs link in the website header works and goes to https://immutable-js.github.io/immutable-js/docs/#/ while Read the Docs link goes to https://immutable-js.github.io/immutable-js/docs/#/