我正在使用ExceptionNotification。异常通知用于在发生错误时向我发送电子邮件，但现在它没有。
发生错误并且异常通知程序要发送时，我收到以下错误：
W, [2015-04-21T15:19:14.464284 #98174] WARN -- : An error occurred when sending a notification using 'email' notifier. NoMethodError: private method `include' called for #<Class:0x007fe291e11ad8>
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/actionmailer-4.0.8/lib/action_mailer/base.rb:482:in `method_missing'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:20:in `block in extended'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:19:in `class_eval'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:19:in `extended'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:137:in `extend'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:137:in `block in mailer'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:136:in `tap'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:136:in `mailer'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:157:in `create_email'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier/email_notifier.rb:143:in `call'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier.rb:94:in `fire_notification'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier.rb:39:in `block in notify_exception'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier.rb:38:in `each'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notifier.rb:38:in `notify_exception'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notification/rack.rb:42:in `rescue in call'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/exception_notification-4.1.0/lib/exception_notification/rack.rb:32:in `call'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/newrelic_rpm-3.11.2.286/lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/warden-1.2.3/lib/warden/manager.rb:35:in `block in call'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `catch'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `call'
/Users/Will/.rvm/gems/ruby-2.0.0-p481@railstutorial_rails_4_0/gems/newrelic_rpm-3.11.2.286/lib/new_relic/agent/instrumentation/middleware_tracing.rb:67:in `call'
等
如何调试？
答案 0 :(得分：3)
检查GitHub issues for the project中的错误报告。看起来4.1.0上发生了an open issue about your problem。尝试降级到4.0.1。