我在启动Rails应用程序时遇到问题。我运行rails s，遇到以下错误：
=> Booting WEBrick
=> Rails 5.0.1 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
Exiting
Traceback (most recent call last):
14: from bin/rails:4:in `<main>'
13: from bin/rails:4:in `require'
12: from /usr/local/lib/ruby/gems/2.5.0/gems/railties-5.0.1/lib/rails/commands.rb:18:in `<top (required)>'
11: from /usr/local/lib/ruby/gems/2.5.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
10: from /usr/local/lib/ruby/gems/2.5.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:85:in `server'
9: from /usr/local/lib/ruby/gems/2.5.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap'
8: from /usr/local/lib/ruby/gems/2.5.0/gems/railties-5.0.1/lib/rails/commands/commands_tasks.rb:90:in `block in server'
7: from /usr/local/lib/ruby/gems/2.5.0/gems/railties-5.0.1/lib/rails/commands/server.rb:77:in `start'
6: from /usr/local/lib/ruby/gems/2.5.0/gems/railties-5.0.1/lib/rails/commands/server.rb:124:in `log_to_stdout'
5: from /usr/local/lib/ruby/gems/2.5.0/gems/rack-2.0.5/lib/rack/server.rb:354:in `wrapped_app'
4: from /usr/local/lib/ruby/gems/2.5.0/gems/railties-5.0.1/lib/rails/commands/server.rb:59:in `app'
3: from /usr/local/lib/ruby/gems/2.5.0/gems/rack-2.0.5/lib/rack/server.rb:219:in `app'
2: from /usr/local/lib/ruby/gems/2.5.0/gems/rack-2.0.5/lib/rack/server.rb:319:in `build_app_and_options_from_config'
1: from /usr/local/lib/ruby/gems/2.5.0/gems/rack-2.0.5/lib/rack/builder.rb:36:in `parse_file'
/usr/local/lib/ruby/gems/2.5.0/gems/rack-2.0.5/lib/rack/builder.rb:36:in `[]': invalid byte sequence in UTF-8 (ArgumentError)
我不知道发生了什么，为什么会发生。我已经在网上搜索了所有解决方案。有人可以帮我弄这个吗？谢谢。