rails sができないです。

Question

現状

cloud9を使っていて
Ubuntuでrails sを実行すると

ActionController::RoutingError (uninitialized constant HomeController):

とエラーが出ます。

問題のコード

ActionController::RoutingError (uninitialized constant HomeController):
  
activesupport (6.0.2.2) lib/active_support/inflector/methods.rb:282:in `const_get'
activesupport (6.0.2.2) lib/active_support/inflector/methods.rb:282:in `block in constantize'
activesupport (6.0.2.2) lib/active_support/inflector/methods.rb:280:in `each'
activesupport (6.0.2.2) lib/active_support/inflector/methods.rb:280:in `inject'
activesupport (6.0.2.2) lib/active_support/inflector/methods.rb:280:in `constantize'
activesupport (6.0.2.2) lib/active_support/dependencies/zeitwerk_integration.rb:19:in `constantize'
actionpack (6.0.2.2) lib/action_dispatch/http/request.rb:88:in `controller_class_for'
actionpack (6.0.2.2) lib/action_dispatch/http/request.rb:81:in `controller_class'
actionpack (6.0.2.2) lib/action_dispatch/routing/route_set.rb:45:in `controller'
actionpack (6.0.2.2) lib/action_dispatch/routing/route_set.rb:31:in `serve'
actionpack (6.0.2.2) lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack (6.0.2.2) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (6.0.2.2) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (6.0.2.2) lib/action_dispatch/routing/route_set.rb:837:in `call'
warden (1.2.8) lib/warden/manager.rb:36:in `block in call'
warden (1.2.8) lib/warden/manager.rb:34:in `catch'
warden (1.2.8) lib/warden/manager.rb:34:in `call'
rack (2.2.2) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.2) lib/rack/etag.rb:27:in `call'
rack (2.2.2) lib/rack/conditional_get.rb:27:in `call'
rack (2.2.2) lib/rack/head.rb:12:in `call'
actionpack (6.0.2.2) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.2.2) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.2) lib/rack/session/abstract/id.rb:260:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/cookies.rb:648:in `call'
activerecord (6.0.2.2) lib/active_record/migration.rb:567:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (6.0.2.2) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (6.0.2.2) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
web-console (4.0.1) lib/web_console/middleware.rb:132:in `call_app'
web-console (4.0.1) lib/web_console/middleware.rb:19:in `block in call'
web-console (4.0.1) lib/web_console/middleware.rb:17:in `catch'
web-console (4.0.1) lib/web_console/middleware.rb:17:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (6.0.2.2) lib/rails/rack/logger.rb:38:in `call_app'
railties (6.0.2.2) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (6.0.2.2) lib/active_support/tagged_logging.rb:80:in `block in tagged'
activesupport (6.0.2.2) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (6.0.2.2) lib/active_support/tagged_logging.rb:80:in `tagged'
railties (6.0.2.2) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.2.2) lib/rack/method_override.rb:24:in `call'
rack (2.2.2) lib/rack/runtime.rb:22:in `call'
activesupport (6.0.2.2) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/static.rb:126:in `call'
rack (2.2.2) lib/rack/sendfile.rb:110:in `call'
actionpack (6.0.2.2) lib/action_dispatch/middleware/host_authorization.rb:83:in `call'
webpacker (4.2.2) lib/webpacker/dev_server_proxy.rb:23:in `perform_request'
rack-proxy (0.6.5) lib/rack/proxy.rb:57:in `call'
railties (6.0.2.2) lib/rails/engine.rb:526:in `call'
puma (4.3.3) lib/puma/configuration.rb:228:in `call'
puma (4.3.3) lib/puma/server.rb:682:in `handle_request'
puma (4.3.3) lib/puma/server.rb:472:in `process_client'
puma (4.3.3) lib/puma/server.rb:328:in `block in run'
puma (4.3.3) lib/puma/thread_pool.rb:134:in `block in spawn_thread'