cloud9でのRailsサーバー立ち上げエラー

cloud9でサーバー立ち上げをrails server -b $IP -p $PORTで実行しましたが、以下の出力結果となってしまい、うまくいきません。（昨日までは問題なく立ち上がってました）

何卒ご回答のほど宜しくお願いします。

以下長くて申し訳ありません。

Booting WEBrick

=> Rails 4.2.4 application starting in development on http://0.0.0.0:8080
=> Run rails server -h for more startup options
=> Ctrl-C to shutdown server
Exiting
/usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:268:in load': /home/ubuntu/workspace/gatebook/config/routes.rb:8: syntax error, unexpected tIDENTIFIER, expecting keyword_end (SyntaxError) get '/notes/:id' => 'notes#show'as:'note' ^ from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:268:in block in load'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:240:in load_dependency' from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:268:in load'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application/routes_reloader.rb:40:in block in load_paths' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application/routes_reloader.rb:40:in each'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application/routes_reloader.rb:40:in load_paths' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application/routes_reloader.rb:16:in reload!'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application/routes_reloader.rb:26:in block in updater' from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/file_update_checker.rb:75:in call'
from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/file_update_checker.rb:75:in execute' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application/routes_reloader.rb:27:in updater'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application/routes_reloader.rb:7:in execute_if_updated' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application/finisher.rb:69:in block in module:Finisher'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/initializable.rb:30:in instance_exec' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/initializable.rb:30:in run'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/initializable.rb:55:in block in run_initializers' from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:226:in block in tsort_each'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:348:in block (2 levels) in each_strongly_connected_component' from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:429:in each_strongly_connected_component_from'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:347:in block in each_strongly_connected_component' from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in each'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in call' from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in each_strongly_connected_component'
from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:224:in tsort_each' from /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:203:in tsort_each'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/initializable.rb:54:in run_initializers' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/application.rb:352:in initialize!'
from /home/ubuntu/workspace/gatebook/config/environment.rb:5:in <top (required)>' from /home/ubuntu/workspace/gatebook/config.ru:3:in require'
from /home/ubuntu/workspace/gatebook/config.ru:3:in block in <main>' from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:55:in instance_eval'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:55:in initialize' from /home/ubuntu/workspace/gatebook/config.ru:in new'
from /home/ubuntu/workspace/gatebook/config.ru:in <main>' from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:49:in eval'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:49:in new_from_string' from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:40:in parse_file'
from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:299:in build_app_and_options_from_config' from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:208:in app'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/commands/server.rb:61:in app' from /usr/local/rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:336:in wrapped_app'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/commands/server.rb:139:in log_to_stdout' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/commands/server.rb:78:in start'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:80:in block in server' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in tap'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in server' from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:39:in run_command!'
from /usr/local/rvm/gems/ruby-2.2.1/gems/railties-4.2.4/lib/rails/commands.rb:17:in <top (required)>' from /home/ubuntu/workspace/gatebook/bin/rails:9:in require'
from /home/ubuntu/workspace/gatebook/bin/rails:9:in <top (required)>' from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in load'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in call' from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.7.2/lib/spring/client/command.rb:7:in call'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.7.2/lib/spring/client.rb:30:in run' from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.7.2/bin/spring:49:in <top (required)>'
from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.7.2/lib/spring/binstub.rb:11:in load' from /usr/local/rvm/gems/ruby-2.2.1/gems/spring-1.7.2/lib/spring/binstub.rb:11:in <top (required)>'
from /home/ubuntu/workspace/gatebook/bin/spring:13:in require' from /home/ubuntu/workspace/gatebook/bin/spring:13:in <top (required)>'
from bin/rails:3:in load' from bin/rails:3:in <main>'