Facebook Graph API: “Feed” no longer returns “From” (i.e. Author) Field

Question

Recently, when using the /feed Facebook Graph API method, it has stopped returning the From field. This field typically contains the Id

Answer 1

It is only included if you use a Page Token. v2.11 of the Graph API (90-Day Breaking Changes):

/page/* — User information will not be included in GET responses for any objects owned by (on) a Page unless the request is made with a Page access token. This affects all nodes and edges that return data for objects owned by a Page.

Source: https://developers.facebook.com/docs/graph-api/changelog/version2.11

...or in the link of your question:

Any valid access token can read posts on a public Page, but responses will not include User information.

A Page access token can read all Posts posted to or posted by that Page, and responses will include User information.