Hello Bree,

After you enter the app id, you need to save first then connect. Or you can follow this steps to troubleshoot your issue:

1. Edit your Facebook application.
2. Check Site URL, App Domain make sure they are the same as your site domain (http://www.yoursite.com and http://yoursite.com make a big difference)
3. Reset the App Secret
4. Go to the EasyBlog -> Autoposting -> Advanced Settings page and revoke the access.
5. Go though the EasyBlog -> Autoposting -> Step by step guide and re-enter the new key and reauthenticate the Facebook access.

We can configure it for you if you can provide us your backend and Facebook access. Hope this helps.