title: Ruby on rails uglifier error
body: <p>On windows and yes, node.js is installed.</p>
  
  <p>I just installed ruby on rails following a video tutorial but when I go to run rails server I get this error:</p>
  
  <pre><code>c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:80:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `each'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `block in require'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `each'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `require'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/bundler-1.11.2/lib/bundler.rb:99:in `require'
          from c:/row/dev/Hello_World/config/application.rb:7:in `&lt;top (required)&gt;'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:78:in `require'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:78:in `block in server'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `tap'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `server'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
          from c:/row/Ruby21/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/commands.rb:17:in `&lt;top (required)&gt;'
          from bin/rails:4:in `require'
          from bin/rails:4:in `&lt;main&gt;'
  </code></pre>
  
  <p>my gemfile does have uglifier in it uglifier is installed, and the bundle install shows uglifier being used.</p>
  
  <p>What might the issue be?</p>