Heroku + Facebook：无效的redirect_uri：应用程序配置不允许给定URL

Question

我向Heroku部署了Rails应用程序的暂存版本，我正在使用Devise gem并在 /config/initializers/devise.rb 中存储凭据，如下所示：

# production
  config.omniauth :facebook, '11', '22',
      :site              => 'https://graph.facebook.com',
      :authorize_path    => '/oauth/authorize',
      :access_token_path => '/oauth/access_token',
      :scope => 'email, publish_stream, read_friendlists'

  # staging
  config.omniauth :facebook, '33', '44',
      :site              => 'https://graph.facebook.com',
      :authorize_path    => '/oauth/authorize',
      :access_token_path => '/oauth/access_token',
      :scope => 'email, publish_stream, read_friendlists'
  # localhost
  config.omniauth :facebook, '55', '66',
      :site              => 'https://graph.facebook.com',
      :authorize_path    => '/oauth/authorize',
      :access_token_path => '/oauth/access_token',
      :scope => 'email, publish_stream, read_friendlists'

Localhost和生产运行良好，但暂存版本不行。我在Facebook管理中使用与生产和登台版本完全相同的设置，但是暂存版本仍然返回此错误消息：

{
   "error": {
      "message": "Invalid redirect_uri: Given URL is not allowed by the Application configuration.",
      "type": "OAuthException",
      "code": 191
   }
}

它让我发疯，因为在2个环境中它正在工作，但不适用于第三个环境（用于分期）。什么提示可能是错的？