git push heroku master - 获取存储库，完成。一切都是最新的

Question

注意：我正在使用iOS Mavericks。 我一直在使用RailsApp项目教程。

它说一切正常：

MacBook-Air:XXX zachmachuca$ git push heroku master
Fetching repository, done.
Everything up-to-date

但是当我输入$ heroku open时，该页面会显示我：

  

您要查找的页面不存在。您可能错误输入了   地址或页面可能已移动。

这是我的Gemfile：

source 'https://rubygems.org'


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'

gem 'rails', '4.1.5'

# Use sqlite3 as the database for Active Record
group :development,:test do
gem 'sqlite3'
end

group :production do
gem 'pg'
end

# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.3'

# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'

# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails', '~> 4.0.0'

# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer',  platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'

# Turbolinks makes following links in your web application faster. Read more:  
https://github.com/rails/turbolinks
gem 'turbolinks'

# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'

# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0',          group: :doc

# Spring speeds up development by keeping your application running in the background. Read
 more: https://github.com/rails/spring
gem 'spring',        group: :development

# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use unicorn as the app server
# gem 'unicorn'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

# Use debugger
# gem 'debugger', group: [:development, :test]

我找不到明确的错误消息。