私は ruby の初心者です。Mac で「HelloRubyWeb」という名前の最初の ruby on rails アプリケーションを作成しました。次に「cd HelloRuby」と入力しましたが、コマンド「rails s」を入力すると、次のエラー ログが返されました。
/Library/Ruby/Gems/1.8/gems/bundler-1.1.5/lib/bundler/runtime.rb:74:in `require': no such file to load -- coffee/rails (LoadError)
from /Library/Ruby/Gems/1.8/gems/bundler-1.1.5/lib/bundler/runtime.rb:74:in `require'
from /Library/Ruby/Gems/1.8/gems/bundler-1.1.5/lib/bundler/runtime.rb:55:in `each'
from /Library/Ruby/Gems/1.8/gems/bundler-1.1.5/lib/bundler/runtime.rb:55:in `require'
from /Library/Ruby/Gems/1.8/gems/bundler-1.1.5/lib/bundler.rb:119:in `require'
from /Users/admin/Ruby/HelloRuby/config/application.rb:7
from /Library/Ruby/Gems/1.8/gems/railties-3.2.7/lib/rails/commands.rb:53:in `require'
from /Library/Ruby/Gems/1.8/gems/railties-3.2.7/lib/rails/commands.rb:53
from /Library/Ruby/Gems/1.8/gems/railties-3.2.7/lib/rails/commands.rb:50:in `tap'
from /Library/Ruby/Gems/1.8/gems/railties-3.2.7/lib/rails/commands.rb:50
from script/rails:6:in `require'
from script/rails:6
誰でも私を助けることができますか?どうもありがとう。