Error on posting on behalf of a Facebook page

Question

I have an app that programmatically make post on a configured Facebook Page. My app obviously have both the manage_pages and publish_pages permissions approved and I'm using pages access token

Everything work well since now, but recently when I POST on page feed

https://graph.facebook.com/v3.1/234002440799692/feed 

I get this error:

{"error": {
   "message":"(#200) Requires either publish_to_groups permission and app being installed in the group, or manage_pages and publish_pages as an admin with sufficient administrative permission",
   "type":"OAuthException",
   "code":200,
   "fbtrace_id":"HEVcI\/Tq3fW"
}}

I know that Facebook has deprecated publish_actions scope, so that it's not possible anymore to post programmatically on the personal feed, but I can't find out why the post on a page return this kind of error. Some further infos:

• posting with a developer account actually work
• the user by which the page access token is obtained, created the page on Facebook (so I think it's an admin for the page)
• i recently migrated from graph_api v2.12 to v.3.1

Any suggestion will be appreciated Thanks

Answer 1

I figured it out what the problem with some pages is. It seem that now, if the user grant the manage_pages and publish_pages permission, that will be valid only for already existing pages!

New pages haven't the permission granted by default.

The only way I can fix the problem was to remove my app from the user profile (Facebook Settings > Business Integrations > Select the app > Remove) and then prompt the user again with the Facebook OAuth permission dialog.

I don't know if there is a way to force the app removal programmatically, but I can't find out.

Answer 2

You can use the following URL:

https://graph.facebook.com/v7.0/234002440799692/feed?&access_token={access_token}