Facebook upload error: Games must reference one of our supported SDKs via our CDN.

I keep getting the same error when trying to upload a Facebook Gameroom or WebGL build.

Error:

Must Reference SDK via CDN

Games must reference one of our supported SDKs via our CDN.

Is it indeed impossible to upload a Unity build to Facebook at this time, is it a bug that is being worked on?

There are numerous ambiguous references to this issue on the web, all unresolved:

https://stackoverflow.com/questions/49638259/cannot-upload-game-assets-to-facebook-web-hosting

https://forum.unity.com/threads/cant-upload-game-to-fb-games-must-reference-one-of-our-supported-sdks-via-our-cdn.543028/

Still this error happen in 2020 I can’t fix this.