cloud9でrails sを実行しても起動できない。

Question

前提・実現したいこと

rails s　を実行したままターミナルを実行してしまいました。
エラーを解決しようと試みたんですがもっと分からないエラーが出てしまいました。
rails serverを起動したいです。

発生している問題・エラーメッセージ

=> Booting Puma
=> Rails 5.2.6 application starting in development
=> Run rails server -h for more startup options
Puma starting in single mode...

• Version 3.12.6 (ruby 2.6.3-p62), codename: Llamas in Pajamas
• Min threads: 5, max threads: 5
• Environment: development

Exiting
Traceback (most recent call last):
40: from bin/rails:3:in <main>' 39: from bin/rails:3:in load'
38: from /home/ec2-user/environment/Bookers/bin/spring:15:in <top (required)>' 37: from /home/ec2-user/environment/Bookers/bin/spring:15:in require'
36: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/spring-2.1.1/lib/spring/binstub.rb:11:in <top (required)>' 35: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/spring-2.1.1/lib/spring/binstub.rb:11:in load'
34: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/spring-2.1.1/bin/spring:49:in <top (required)>' 33: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/spring-2.1.1/lib/spring/client.rb:30:in run'
32: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/spring-2.1.1/lib/spring/client/command.rb:7:in call' 31: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/spring-2.1.1/lib/spring/client/rails.rb:28:in call'
30: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/spring-2.1.1/lib/spring/client/rails.rb:28:in load' 29: from /home/ec2-user/environment/Bookers/bin/rails:9:in <top (required)>'
28: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.7.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in require' 27: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.7.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in require_with_bootsnap_lfi'
26: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.7.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in register' 25: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.7.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in block in require_with_bootsnap_lfi'
24: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/bootsnap-1.7.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in require' 23: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.6/lib/rails/commands.rb:18:in <main>'
22: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.6/lib/rails/command.rb:46:in invoke' 21: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.6/lib/rails/command/base.rb:69:in perform'
20: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/thor-1.1.0/lib/thor.rb:392:in dispatch' 19: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/thor-1.1.0/lib/thor/invocation.rb:127:in invoke_command'
18: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/thor-1.1.0/lib/thor/command.rb:27:in run' 17: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.6/lib/rails/commands/server/server_command.rb:142:in perform'
16: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.6/lib/rails/commands/server/server_command.rb:142:in tap' 15: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.6/lib/rails/commands/server/server_command.rb:147:in block in perform'
14: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/railties-5.2.6/lib/rails/commands/server/server_command.rb:53:in start' 13: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/rack-2.2.3/lib/rack/server.rb:327:in start'
12: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/rack/handler/puma.rb:73:in run' 11: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/launcher.rb:186:in run'
10: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/single.rb:98:in run' 9: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/runner.rb:153:in load_and_bind'
8: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:90:in parse' 7: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:90:in each'
6: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:106:in block in parse' 5: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:266:in add_tcp_listener'
4: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:266:in each' 3: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:267:in block in add_tcp_listener'
2: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:273:in add_tcp_listener' 1: from /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:273:in new'
/home/ec2-user/.rvm/gems/ruby-2.6.3/gems/puma-3.12.6/lib/puma/binder.rb:273:in `initialize': Address already in use - bind(2) for "127.0.0.1" port 8080 (Errno::EADDRINUSE)

該当のソースコード

ターミナル
rails s

試したこと

初めは、=> Booting Puma
=> Rails 5.2.6 application starting in development
=> Run rails server -h for more startup options
A server is already running. Check /home/ec2-user/environment/Bookers/tmp/pids/server.pid.
Exitingというエラーが出たのでserver/pidを削除しました。

rails -v 5.2.6

https://qiita.com/chiaaaakiiiii/items/2ec9f1d1195623936c8c
参考にしたサイトです。