Error occured at line 423

I can successfully grant rights to an application, then whey I attempt to publish a blog post, it returns the following error:

While publishing “Heirloom Seeds are in!” to Facebook, an error occured:

Facebook returned an unexpected error: An unexpected error has occurred. Please retry your request later.
Try to resolve this issue, update the plugin or inform the author about the problem.
[Error occured at line 423]

Troubleshooting I have done:
◾Disabled all other plugins
◾Deleted FB App
◾Deleted WP Plugin
◾Created New FB App
◾Reinstalled WP Plugin
◾Reauthorized WP Plugin