[webpage] EDIT THIS PAGE Button URL not working

[PabloLION]

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

EDIT THIS PAGE button onClick will open a new URL which gives a 404.

Expected Behavior 🤔

EDIT THIS PAGE button onClick can direct users correctly

Steps to Reproduce 🕹

Steps:

1. Go to Paper API page or Card API page
2. (Set language to ENGLISH) Click the EDIT THIS PAGE button in top part of the page body.

Context 🔦

I'm trying to add a line like this to Porps Chapter:

variant | 'elevation'\| 'outlined' | 'elevation' | The variant to use.
-- | -- | -- | --

Idea on fixing this bug

• It seems you are using JSON for the webpages(maybe), so I made a PR Update card.json #28369. I'm not so certain because I didn't see sx in Props.
• The handicup is that editing JSON may not be very similar to editing an HTML, also it's hard to see the edit before PR. In my case I just did a copy paste so it should be correct.
• Here's the Workaround I propose: temporarily remove/disable the EDIT THIS PAGE button

Your Environment 🌎

Chrome 91

[PabloLION]

If you approve this work-around. I would make a new PR on components/ApiPage.js

[oliviertassinari]

It's similar to #28345, but it's actually a duplicate of #23406 this time, we fixed the root cause in #23821. I'm closing since it impacts a legacy version (v4).

[PabloLION]

I didn't search across closed PRs. Sorry for this.