ruby-on-rails – Solidus安装失败

/Users/user1/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/handlebars_assets-0.19.1/lib/handlebars_assets.rb:20:in’clock in register_extensions’：undefined method’ register_engine’代表nil：NilClass(NoMethodError)

不确定这是否有帮助,但在尝试安装Solidus之前,我正在开发一个Spree项目.

另外,这是我的Gemfile：

source 'https://rubygems.org'
  # Solidus E-Commerce
  gem 'solidus'
  gem 'solidus_auth_devise'

  # Bundle edge Rails instead: gem 'rails',github: 'rails/rails'
  gem 'rails','4.2.4'
  # Use sqlite3 as the database for Active Record
  gem 'sqlite3'
  # Use SCSS for stylesheets
  gem 'sass-rails','~> 5.0'
  # Use Uglifier as compressor for JavaScript assets
  gem 'uglifier','>= 1.3.0'
  # Use CoffeeScript for .coffee assets and views
  gem 'coffee-rails','~> 4.1.0'
  # See https://github.com/rails/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

  # 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

  group :development,:test do
    # Call 'byebug' anywhere in the code to stop execution and get a debugger console
    gem 'byebug'
  end

  group :development do
    # Access an IRB console on exception pages or by using <%= console %> in views
    gem 'web-console','~> 2.0'

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

任何帮助都非常感谢.