HerokuでApplication error

前提・実現したいこと

Ruby on railsでHerokuにアプリケーションをデプロイして初期画面を表示させたいです。

発生している問題

初期画面のhttps://butube.herokuapp.com/にアクセスするとしたの画面が表示されてしまう。

エラーメッセージ

heroku logs --tail
とするとログが出力されます。

2020-06-04T08:59:47.581168+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-
省略
2020-06-04T08:59:47.581313+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/builder.rb:116:in `new_from_string'
2020-06-04T08:59:47.581316+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/builder.rb:105:in `load_file'
2020-06-04T08:59:47.581336+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/builder.rb:66:in `parse_file'
2020-06-04T08:59:47.581337+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:349:in `build_app_and_options_from_config'
2020-06-04T08:59:47.581343+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:249:in `app'
2020-06-04T08:59:47.581345+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:422:in `wrapped_app'
2020-06-04T08:59:47.581364+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:312:in `block in start'
2020-06-04T08:59:47.581365+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:379:in `handle_profiling'
/app/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/command.rb:27:in `run'
2020-06-04T08:59:47.581415+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/invocation.rb:127:in `invoke_command'
2020-06-04T08:59:47.667499+00:00 heroku[web.1]: State changed from crashed to starting
2020-06-04T09:00:04.131661+00:00 app[web.1]: DEPRECATION WARNING: Including LoggerSilence is deprecated and will be removed in Rails 6.1. Please use `ActiveSupport::LoggerSilence` instead (called from <top (required)> at /app/config/application.rb:3)
2020-06-04T09:00:04.213157+00:00 app[web.1]: => Booting Puma
2020-06-04T09:00:04.213160+00:00 app[web.1]: => Rails 6.0.3.1 application starting in production
2020-06-04T09:00:04.213160+00:00 app[web.1]: => Run `rails server --help` for more startup options
2020-06-04T09:00:06.496369+00:00 app[web.1]: Exiting
2020-06-04T09:00:06.496674+00:00 app[web.1]: /app/vendor/bundle/ruby/2.6.0/gems/i18n-1.8.2/lib/i18n/backend/base.rb:227:in `load_file': can not load translations from /app/config/locales/en.yml: expects it to return a hash, but does not (I18n::InvalidLocaleData)
2020-06-04T09:00:06.496701+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/i18n-1.8.2/lib/i18n/backend/base.rb:18:in `block in load_translations'
2020-06-04T09:00:06.496702+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/i18n-1.8.2/lib/i18n/backend/base.rb:18:in `each'
2020-06-04T09:00:06.496705+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/i18n-1.8.2/lib/i18n/backend/base.rb:18:in `load_translations'
2020-06-04T09:00:06.496706+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/i18n-1.8.2/lib/i18n/backend/simple.rb:80:in `init_translations'
2020-06-04T09:00:06.496708+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/i18n-1.8.2/lib/i18n/backend/simple.rb:65:in `eager_load!'
2020-06-04T09:00:06.496729+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/i18n-1.8.2/lib/i18n.rb:76:in `eager_load!'
2020-06-04T09:00:06.496730+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/application/finisher.rb:123:in `each'
2020-06-04T09:00:06.496734+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/application/finisher.rb:123:in `block in <module:Finisher>'
2020-06-04T09:00:06.496737+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/initializable.rb:32:in `instance_exec'
2020-06-04T09:00:06.496758+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/initializable.rb:32:in `run'
2020-06-04T09:00:06.496758+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/initializable.rb:61:in `block in run_initializers'
2020-06-04T09:00:06.496761+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
2020-06-04T09:00:06.496764+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
2020-06-04T09:00:06.496793+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
2020-06-04T09:00:06.496794+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
2020-06-04T09:00:06.496799+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:347:in `each'
2020-06-04T09:00:06.496799+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:347:in `call'
2020-06-04T09:00:06.496802+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
2020-06-04T09:00:06.496805+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
2020-06-04T09:00:06.496832+00:00 app[web.1]: from /app/vendor/ruby-2.6.6/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
2020-06-04T09:00:06.496833+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/initializable.rb:60:in `run_initializers'
2020-06-04T09:00:06.496837+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/application.rb:363:in `initialize!'
2020-06-04T09:00:06.496855+00:00 app[web.1]: from /app/config/environment.rb:2:in `<top (required)>'
2020-06-04T09:00:06.496859+00:00 app[web.1]: from config.ru:1:in `require_relative'
2020-06-04T09:00:06.496860+00:00 app[web.1]: from config.ru:1:in `block in <main>'
2020-06-04T09:00:06.496860+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/builder.rb:116:in `eval'
2020-06-04T09:00:06.496861+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/builder.rb:116:in `new_from_string'
2020-06-04T09:00:06.496861+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/builder.rb:105:in `load_file'
2020-06-04T09:00:06.496864+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/builder.rb:66:in `parse_file'
2020-06-04T09:00:06.496864+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:349:in `build_app_and_options_from_config'
2020-06-04T09:00:06.496895+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:249:in `app'
2020-06-04T09:00:06.496895+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:422:in `wrapped_app'
2020-06-04T09:00:06.496899+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:312:in `block in start'
2020-06-04T09:00:06.496900+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:379:in `handle_profiling'
2020-06-04T09:00:06.496902+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/rack-2.2.2/lib/rack/server.rb:311:in `start'
2020-06-04T09:00:06.496931+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/commands/server/server_command.rb:39:in `start'
2020-06-04T09:00:06.496932+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/commands/server/server_command.rb:147:in `block in perform'
2020-06-04T09:00:06.496935+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.1/lib/rails/commands/server/server_command.rb:138:in `tap'
省略
2020-06-04T09:00:09.918944+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=butube.herokuapp.com request_id=5342f61d-fcdf-46fb-a029-efbe12ab96dc fwd="133.201.148.96" dyno= connect= service= status=503 bytes= protocol=https

おそらく下のコードがエラーの原因だと思います。

DEPRECATION WARNING: Including LoggerSilence is deprecated and will be removed in Rails 6.1. Please use `ActiveSupport::LoggerSilence` instead (called from <top (required)> at /app/config/application.rb:3)

おそらく
「LoggerSilenceの代わりにActiveSupport::LoggerSilenceを使いましょう」のようなことを伝えてくれているのだと思います。
どのようにすれば↑の指示に従えるのかわかりません。

一応調べて下のようにしましたがどうすればいいのかがいまいちわかりませんので良ければ教えていただきたいです！
application_controller.rb

  class MyLogger < Logger
    include LoggerSilence
    include ActiveSupport::LoggerThreadSafeLevel
  end

config/environment/development.rb
config/environment/production.rb
config/environment/test.rb
上の３つのファイルに

error_logger = ActiveSupport::Logger.new(STDOUT)
  error_logger.level = Logger::ERROR
  Rails.logger.extend ActiveSupport::Logger.broadcast(error_logger)

を追記しましたがうまくいきません。