楼主解决了吗，我在 ubuntu 上的 我运行的时候报这个错

/home/ruby2.3.0/lib/ruby/gems/2.3.0/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 /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `each'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `block in require'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `each'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `require'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/bundler-1.11.2/lib/bundler.rb:99:in `require'
    from /home/windys/WorkSpace/HelloRails/config/application.rb:7:in `<top (required)>'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:78:in `require'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:78:in `block in server'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>'
    from /home/windys/WorkSpace/HelloRails/bin/rails:9:in `require'
    from /home/windys/WorkSpace/HelloRails/bin/rails:9:in `<top (required)>'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.7.1/lib/spring/client/rails.rb:28:in `load'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.7.1/lib/spring/client/rails.rb:28:in `call'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.7.1/lib/spring/client/command.rb:7:in `call'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.7.1/lib/spring/client.rb:30:in `run'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.7.1/bin/spring:49:in `<top (required)>'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.7.1/lib/spring/binstub.rb:11:in `load'
    from /home/ruby2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.7.1/lib/spring/binstub.rb:11:in `<top (required)>'
    from /home/ruby2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /home/ruby2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /home/windys/WorkSpace/HelloRails/bin/spring:13:in `<top (required)>'
    from bin/rails:3:in `load'
    from bin/rails:3:in `<main>'