Rails + Google Polymer -

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i getting error when try hit homepage. trying integrate polymer rails app. suggestions?

gem 'polymer-rails', '~> 0.1.9' gem 'polymer-core-rails' gem 'polymer-paper-rails

actionview::template::error (couldn't find file 'webcomponentsjs/webcomponents-lite' type 'application/javascript'): 3: <head> 4: <title>polymer rails example</title> 5: <%= stylesheet_link_tag 'application', media: 'all' %> 6: <%= javascript_include_tag 'application' %> 7: <%= html_import_tag 'application'%> 8: <%= csrf_meta_tags %> 9: </head> app/assets/javascripts/application.js:13 app/views/layouts/application.html.erb:6:in `_app_views_layouts_application_html_erb___3181512530753562001_70181169375440' enter image description here

enter image description here


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