filestack-rails: undefined local variable or method `filepicker_js_include_tag'

Hello, I recently added the filepicker-rails gem to a Rails 4.0.2 project. It appears that the view helpers are not being included properly as I end up getting an ‘undefined local variable or method’ error for any of the helpers in FilepickerRails::ApplicationHelper.

The form helpers appear to be working fine however.