Facebook PHP - posting error to timeline but not to page - php

Question

I am trying to post to a Facebook account (with permissions) using the PHP
API. I am giving our users two options - posting to the Feed, and posting
to a specific facebook page. I am getting an error in the first case, but
not in the second case. In the code below:
$access_token is the access token I got back from linking to my app. It's of type
"User", and has the following permissions:
email
pages_show_list
business_management
pages_read_engagement
pages_manage_metadata
pages_read_user_content
pages_manage_ads
pages_manage_posts
pages_manage_engagement
public_profile
Where $page_token is, well, a "Page" type token, with the same set of permissions.
When I post to the page, it works fine. But when I try to post to the timeline, I get
the error:
Graph Error 200 : [Timeline]: [(#200) If posting to a group, requires app being
installed in the group, and either publish_to_groups permission with user token,
or both pages_read_engagement and pages_manage_posts permission with page token;
If posting to a page, requires both pages_read_engagement and pages_manage_posts
as an admin with sufficient administrative permission]
I'm not trying to post to a group, I'm posting to an account's timeline. And, per the
access token debugger, I have the permissions requested anyway. What's going on?
My code is below:
$linkData = [
'link' => $link_to_post,
'appsecret_proof' => $app_secret_proof
];
if ( POSTING TO TIMELINE )
{
$token = $access_token;
$post_to = "/me/feed";
}
else
{
$page_id = $page_id;
$token = $page_token;
$post_to = "/$page_id/feed";
}
// THIS THROWS THE EXCEPTION:
$response = $this->fb->post($post_to, $linkData, $token);

Answer 1

You can not post to a personal timeline via API any more, that was removed ages ago already. (With introduction of API v2.4, if I remember correctly.)
You can only use the Share or the Feed dialog, to offer the user a way to actively share / make a post themselves, https://developers.facebook.com/docs/sharing/web