This error usually occurs if you’ve skipped some or all the permissions for pages or groups requested by Facebook. In order for us to be able to retrieve information so that a service can be added successfully and that your posts will be sent through to the relevant social site, you will always need to accept All permissions which are requested.
To resolve this for Facebook Services, please do the following:
1. Make sure you’re logged out of this social network in all browsers and their tabs.
2. Look to add the service again.
3. You should then be directed to log into the appropriate Facebook account, please ensure to allow all
4. Your Pages or Groups should then be displayed, check your settings are correct and then look to save the
If you’re still experiencing issues with this, please ask for help via email@example.com