浏览器错误：
我们很抱歉，但出了点问题。 该问题已记录下来以供调查。请稍后再试。
Apache错误日志：
App 3307 stdout:
App 3307 stdout:
[ E 2017-11-16 04:58:37.4783 3191/To age/Cor/App/Implementation.cpp:304 ]: Could not spawn process for application /domainname/httpdocs: An error occurred while starting up the preloader.
Error ID: cc913e9e
Error details saved to: /tmp/passenger-error-rMdbsf.html
Message from application: undefined method `web_console' for #<Rails::Application::Configuration:0x005617ca458e08>
Did you mean? console (NoMethodError)
/usr/local/lib/ruby/gems/2.3.0/gems/railties-4.2.1/lib/rails/railtie/configuration.rb:95:in `method_missing'
/domainname/httpdocs/config/application.rb:38:in `<class:Application>'
/domainname/httpdocs/config/application.rb:15:in `<module:Lobbylights421>'
/domainname/httpdocs/config/application.rb:14:in `<top (required)>'
/domainname/httpdocs/config/environment.rb:2:in `require'
/domainname/httpdocs/config/environment.rb:2:in `<top (required)>'
config.ru:3:in `require'
config.ru:3:in `block in <main>'
/usr/local/lib/ruby/gems/2.3.0/gems/rack-1.6.8/lib/rack/builder.rb:55:in `instance_eval'
/usr/local/lib/ruby/gems/2.3.0/gems/rack-1.6.8/lib/rack/builder.rb:55:in `initialize'
config.ru:1:in `new'
config.ru:1:in `<main>'
/usr/local/lib/ruby/gems/2.3.0/gems/passenger-5.1.11/src/helper-scripts/rack-preloader.rb:110:in `eval'
/usr/local/lib/ruby/gems/2.3.0/gems/passenger-5.1.11/src/helper-scripts/rack-preloader.rb:110:in `preload_app'
/usr/local/lib/ruby/gems/2.3.0/gems/passenger-5.1.11/src/helper-scripts/rack-preloader.rb:156:in `<module:App>'
/usr/local/lib/ruby/gems/2.3.0/gems/passenger-5.1.11/src/helper-scripts/rack-preloader.rb:30:in `<module:PhusionPassenger>'
/usr/local/lib/ruby/gems/2.3.0/gems/passenger-5.1.11/src/helper-scripts/rack-preloader.rb:29:in `<main>'
[ E 2017-11-16 04:58:37.4841 3191/Tb age/Cor/Con/CheckoutSession.cpp:285 ]: [Client 3-1] Cannot checkout session because a spawning error occurred. The identifier of the error is cc913e9e. Please see earlier logs for details about the error.
使用的版本：
Ruby 2.3.3
Rails 4.2.1
宝石2.6.14