Установка темы администратора Appwork - Sass :: SyntaxError в Home # index

Question

Я установил тему Appwork to cloud9 ruby ​​на rails как новое приложение, однако, когда я запускаю сервер и открываю страницу браузера приложения, я получаю это, почему я получаю эту ошибку?(Я новичок в рельсах)

    Sass::SyntaxError in Home#index

    Showing /home/ec2-user/environment/rails-starter/app/views/layouts/application.html.erb where line #19 raised:

    ile to import not found or unreadable: ../../../../node_modules/vegas/dist/vegas.

    Load paths:
     /home/ec2-user/environment/rails-starter/app/assets/config
      /home/ec2-user/environment/rails-starter/app/assets/images
      /home/ec2-user/environment/rails-starter/app/assets/javascripts
      /home/ec2-user/environment/rails-starter/app/assets/stylesheets
      /home/ec2-user/environment/rails-starter/vendor/assets/fonts
      /home/ec2-user/environment/rails-starter/vendor/assets/javascripts
      /home/ec2-user/environment/rails-starter/vendor/assets/libs
      /home/ec2-user/environment/rails-starter/vendor/assets/stylesheets
      /usr/local/rvm/gems/ruby-2.4.1/gems/coffee-rails-4.2.2/lib/assets/javascript
      /usr/local/rvm/gems/ruby-2.4.1/gems/actioncable-5.2.0/lib/assets/compiled
      /usr/local/rvm/gems/ruby-2.4.1/gems/activestorage-5.2.0/app/assets/javascripts
      /usr/local/rvm/gems/ruby-2.4.1/gems/actionview-5.2.0/lib/assets/compiled
      /usr/local/rvm/gems/ruby-2.4.1/gems/turbolinks-source-
    5.1.0/lib/assets/javascripts
      /home/ec2-user/environment/rails-starter/vendor/assets
      /home/ec2-user/environment/rails-starter/node_modules