With the change in Facebook API, you can now publish to Facebook Groups again. Before you can publish or schedule posts to Facebook Groups, there are two things you need to do. One is to refresh your Facebook tokens which can be found within the social networks tab. Second, you need to add the MavSocial app in the group settings within Facebook following these steps:
1. On the main page, go to Edit group settings
2. Scroll down to Apps and click Add apps.
3. Search for MavSocial and click on the MavSocial page.
4.Click add and MavSocial will be added to your group settings.