I created a sample application.
Added devise in it, it works fine.
Then added cancan gem into it.
Created an ability class. define some permissions.
Then added line
load_and_authorize_resource
to the Application Controller, after that when i go to the page
http://0.0.0.0:3000/users/sign_in it gave the following error,
NameError in Devise/sessionsController#new
uninitialized constant Session
Rails.root: /home/nazar/rails_projects/sample_can
Please help me, i can not solve this issue.