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
Try to let just config.consider_all_requests_local = true (in config/environments/development.rb)
and remove this line config.log_level = :debug (in config/environments/development.rb)
also, you can try with the gem better errors to see if it fix the problem https://github.com/charliesome/better_errors
if this doesn't fix it, run a "bundle update" in general, to see if there is a gem that is causing problems