exception_notification gem raises ActionView::Template::Error (code converter not found (UTF-8 to UTF-16)) only on Heroku production mode

Question

I create rails app deployed on Heroku. also, exception_notification gem enabled.

when it is on development setup ActionMailer to Gmail, everything is fine a

Answer 1

Quick adjustment to solution by hananamar, otherwise you'll get an error:

gem 'exception_notification', :git => 'git://github.com/alanjds/exception_notification.git', :require => 'exception_notifier'