Getting exception: undefined method 'sort_papermill_path'

[chriscameron]

This is probably something I have misconfigured, but any idea why I'd be getting this error:

undefined method 'sort_papermill_path' for ImagesController

[bbenezech]

Do you have an ImageController? You are supposed to use the default PapermillController provided as an engine.
Can you post relevant parts of your code? sort_papermill_path is a route to a PapermillController action, "sort".
Please see papermill/config/routes.rb and papermill/app/controllers/papermill.rb