"We're sorry, but something went wrong." - Error!

have you tried to run your app in a linux / OS X environement
Additionally you could check your logfile, log/production.log

if you want to have request local, make this setting in your
enviroment (e.g. config/environments/production.rb)
config.action_controller.consider_all_requests_local = true

set this option, specially in the development.rb

kind regards