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私は私のレールサーバを起動しようとするとこのエラーが発生します。私が働いているレポから引っ張る前に、私はサーバーの稼働に問題はありませんでした。私はC9 IDEを使用していますが、それは問題ではないと思います。STDOUTを/home/ubuntu/workspace/shared/log/puma.stdout.log（RuntimeError）にリダイレクトできません
[1708] Puma starting in cluster mode...
[1708] * Version 3.8.2 (ruby 2.3.0-p0), codename: Sassy Salamander
[1708] * Min threads: 1, max threads: 6
[1708] * Environment: development
[1708] * Process workers: 4
[1708] * Phased restart available
[1708] * Listening on tcp://0.0.0.0:8080
[1708] Use Ctrl-C to stop
Exiting
/usr/local/rvm/gems/ruby-2.3.0/gems/puma-3.8.2/lib/puma/runner.rb:111:in `redirect_io': Cannot redirect STDOUT to /home/ubuntu/workspace/shared/log/puma.stdout.log (RuntimeError)
from /usr/local/rvm/gems/ruby-2.3.0/gems/puma-3.8.2/lib/puma/cluster.rb:45:in `redirect_io'
from /usr/local/rvm/gems/ruby-2.3.0/gems/puma-3.8.2/lib/puma/cluster.rb:435:in `run'
from /usr/local/rvm/gems/ruby-2.3.0/gems/puma-3.8.2/lib/puma/launcher.rb:172:in `run'
from /usr/local/rvm/gems/ruby-2.3.0/gems/puma-3.8.2/lib/rack/handler/puma.rb:64:in `run'
from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-2.0.3/lib/rack/server.rb:297:in `start'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-5.0.3/lib/rails/commands/server.rb:104:in `start'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-5.0.3/lib/rails/commands/commands_tasks.rb:90:in `block in server'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-5.0.3/lib/rails/commands/commands_tasks.rb:85:in `tap'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-5.0.3/lib/rails/commands/commands_tasks.rb:85:in `server'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-5.0.3/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-5.0.3/lib/rails/commands.rb:18:in `<top (required)>'
from /home/ubuntu/workspace/bin/rails:9:in `require'
from /home/ubuntu/workspace/bin/rails:9:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/bin/spring:49:in `<top (required)>'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
from /home/ubuntu/workspace/bin/spring:13:in `require'
from /home/ubuntu/workspace/bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'