Ultimate Facebook Permissions / Auto-Posting for Users

Hi there,
I've been using this thread as a sort of guide for the project I am working on:
https://premium.wpmudev.org/forums/topic/autopost-to-users-facebook-wall
I am running into an issue that I am not seeing the widget for facebook permissions on the widget dashboard and/or the dashboard page. Not sure if I am missing something.
I have tried deactivating all other plugins and switching to twentyfifteen as a theme on my development site, but still didn't see the widget.
As far as the functionality I am trying to achieve, I have user submitted posts enabled on the front end, which then become a custom post type that is published upon approval by a site admin. I am trying to get permission to post to the facebook feed/wall of user who submitted the post once it is published.
Thanks for your help!