When I try to launch the rails server, does anyone know how to proceed?
Erro (Bundler::GemRequireError
/home/gabriel/.rvm/gems/ruby-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/gabriel/.rvm/gems/ruby-2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:76:in 'block (2 levels) in require'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in 'each'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in 'block in require'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in 'each'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in 'require'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/bundler-1.11.2/lib/bundler.rb:99:in 'require'
from /home/gabriel/secondExample/config/application.rb:7:in '<top (required)>'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:78:in 'require'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:78:in 'block in server'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in 'tap'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in 'server'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in 'run_command!'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands.rb:17:in '<top (required)>'
from /home/gabriel/secondExample/bin/rails:9:in 'require'
from /home/gabriel/secondExample/bin/rails:9:in '<top (required)>'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/spring-1.6.4/lib/spring/client/rails.rb:28:in 'load'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/spring-1.6.4/lib/spring/client/rails.rb:28:in 'call'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/spring-1.6.4/lib/spring/client/command.rb:7:in 'call'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/spring-1.6.4/lib/spring/client.rb:28:in 'run'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/spring-1.6.4/bin/spring:49:in '<top (required)>'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/spring-1.6.4/lib/spring/binstub.rb:11:in 'load'
from /home/gabriel/.rvm/gems/ruby-2.3.0/gems/spring-1.6.4/lib/spring/binstub.rb:11:in '<top (required)>'
from /home/gabriel/secondExample/bin/spring:13:in 'require'
from /home/gabriel/secondExample/bin/spring:13:in '<top (required)>'
from bin/rails:3:in 'load'
from bin/rails:3:in '<main>'