Hi Everyone, I finally got this working. The problem comes from this:
https://developers.facebook.com/docs/offline-access-deprecation/
In wp-content/plugins/facebook-page-publish/fpp_index.php
On line 663
Change
$permissions = array('offline_access', 'share_item');
to
$permissions = array('share_item');
Then on line 594, change
preg_match('/^.+=\s*(.+)/', $access_token_url, $matches);
to
preg_match('/access_token=(.*)&expires/', $access_token_url, $matches);
Hope this helps.
