rails s 実行時サーバーが起動しない

Question

前提・実現したいこと

Ruby、RonRで環境構築をしアプリケーション作成にとりかかっています。

rail s を実行しましたが以下の様なエラーが出ておりサーバーが起動しません。

発生している問題・エラーメッセージ

[WARNING] Could not load command "rails/commands/server/server_command". Error: uninitialized constant URI::Generic.
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri/ftp.rb:23:in <module:URI>' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri/ftp.rb:13:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri.rb:107:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri.rb:107:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri/rfc2396_parser.rb:13:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri/rfc2396_parser.rb:13:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri/common.rb:13:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri/common.rb:13:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri/generic.rb:12:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri/generic.rb:12:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/core_ext/object/json.rb:4:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/core_ext/object/json.rb:4:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/core_ext/object.rb:11:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/core_ext/object.rb:11:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/configuration.rb:2:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/configuration.rb:2:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/railtie/configuration.rb:1:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/railtie/configuration.rb:1:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/railtie.rb:218:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/railtie.rb:218:in config'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/railtie.rb:122:in config' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/i18n_railtie.rb:9:in class:Railtie'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/i18n_railtie.rb:8:in <module:I18n>' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/i18n_railtie.rb:7:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/railtie.rb:2:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/railtie.rb:2:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails.rb:15:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails.rb:15:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/commands/server/server_command.rb:4:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/commands/server/server_command.rb:4:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/command/behavior.rb:82:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/command/behavior.rb:82:in block (2 levels) in lookup'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/command/behavior.rb:78:in each' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/command/behavior.rb:78:in block in lookup'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/command/behavior.rb:77:in each' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/command/behavior.rb:77:in lookup'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/command.rb:68:in find_by_namespace' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/command.rb:42:in invoke'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/commands.rb:16:in <top (required)>' /Users/saitouhodo/Desktop/sample_app/bin/rails:9:in require'
/Users/saitouhodo/Desktop/sample_app/bin/rails:9:in <top (required)>' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in load'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in call' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/client/command.rb:7:in call'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/client.rb:30:in run' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/spring-2.1.0/bin/spring:49:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in load' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in <top (required)>'
/Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in require' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in require'
/Users/saitouhodo/Desktop/sample_app/bin/spring:15:in <top (required)>' bin/rails:3:in load'
bin/rails:3:in <main>' /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri.rb:99: warning: already initialized constant URI::VERSION_CODE /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri.rb:99: warning: previous definition of VERSION_CODE was here /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri.rb:100: warning: already initialized constant URI::VERSION /Users/saitouhodo/.rbenv/versions/2.5.0/lib/ruby/2.5.0/uri.rb:100: warning: previous definition of VERSION was here rails aborted! Don't know how to build task 'server' (See the list of available tasks with rails --tasks) /Users/saitouhodo/Desktop/sample_app/bin/rails:9:in require'
/Users/saitouhodo/Desktop/sample_app/bin/rails:9:in <top (required)>' /Users/saitouhodo/Desktop/sample_app/bin/spring:15:in <top (required)>'
bin/rails:3:in load' bin/rails:3:in <main>'
(See full trace by running task with --trace)``

ご教授頂きたい事
１.上記のエラーはなぜ発生するのか。
２.どの様に解決すれば良いのか。

以上の２点が知りたいです。よろしくお願いします。

試したこと

・bundle exec rails s を実行しましたが同じエラーが出る
・ターミナルを再起動させても同じエラーが出る

補足情報（FW/ツールのバージョンなど）

OS mac
ruby 2.5.0
rbenv 1.1.2
Homebrew 2.2.5
Rails 5.1.7

エディタ
VScode(同ターミナルでも試しましたが同じエラーが出ました）

新規作成したappファイルの中身
Gemfile app db public
Gemfile.lock bin lib test
README.md config log tmp
Rakefile config.ru package.json vendor