Name Error uninitialized constant Name in NameController

I have a custom rails controller that is not connected to any specific model:

  resources 'ready/set/go', as: :ready_set_go, 
  controller: :ready_set_go, only: [:index, :create, :update]

The controller is named class ReadySetGoController < ApplicationController

When I try navigating to ready_set_go_index_path or '/ready/set/go', it raises an error:

NameError in ReadySetGoController#index
uninitialized constant ReadySetGo