I\'m following the rails tutorial book and using the c9.io web IDE as I follow the tutorials. While working on my sample application, I noticed that exceptions aren\'t being sho
I suggest use another way to show errors instead of use the default of Rails.
I caught the same problem and tried everything, but the gem better_errors saved the day.
In your Gemfile you can use
group :development, :test do # I use that only in dev
gem "better_errors"
# dependency
gem "binding_of_caller"
end