uninitialized constant V8::JSError (NameError) - ruby-on-rails

Question

I got this error when I try to run my RoR application.
After rails server, this error appear:
uninitialized constant V8::JSError (NameError)
E:\Toan\tnkadmin>rails server
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib/less/java_sc
ript/v8_context.rb:61:in `rescue in lock': uninitialized constant V8::JSError (N
ameError)
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib
/less/java_script/v8_context.rb:60:in `lock'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib
/less/java_script/v8_context.rb:19:in `initialize'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib
/less/java_script/v8_context.rb:15:in `new'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib
/less/java_script/v8_context.rb:15:in `instance'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib
/less/loader.rb:13:in `initialize'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib
/less.rb:14:in `new'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib
/less.rb:14:in `<module:Less>'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-2.4.0/lib
/less.rb:9:in `<top (required)>'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-rails-2.4
.2/lib/less/rails.rb:6:in `require'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-rails-2.4
.2/lib/less/rails.rb:6:in `<top (required)>'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-rails-2.4
.2/lib/less-rails.rb:1:in `require'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/less-rails-2.4
.2/lib/less-rails.rb:1:in `<top (required)>'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/
lib/bundler/runtime.rb:72:in `require'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/
lib/bundler/runtime.rb:72:in `block (2 levels) in require'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/
lib/bundler/runtime.rb:70:in `each'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/
lib/bundler/runtime.rb:70:in `block in require'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/
lib/bundler/runtime.rb:59:in `each'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/
lib/bundler/runtime.rb:59:in `require'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/
lib/bundler.rb:132:in `require'
from E:/Toan/tnkadmin/config/application.rb:5:in `<top (required)>'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.1
/lib/rails/commands.rb:74:in `require'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.1
/lib/rails/commands.rb:74:in `block in <top (required)>'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.1
/lib/rails/commands.rb:71:in `tap'
from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.1
/lib/rails/commands.rb:71:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
This is my gemfile
source 'https://rubygems.org'
ruby '2.0.0'
gem 'rails', '~> 4.0.0'
#gem 'rails', '3.2.9'
gem 'thin'
gem 'haml'
gem 'jquery-rails'
gem 'i18n'
gem 'exception_notification'
# To use ActiveModel has_secure_password
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 4.0.0'
gem 'coffee-rails', '~> 4.0.0'
gem 'uglifier', '>= 1.0.3'
gem 'less-rails'
gem 'execjs'
#gem 'twitter-bootstrap-rails'
if RUBY_PLATFORM =~ /mingw/
gem 'therubyracer', path: 'lib/therubyracer-0.11.0beta1-x86-mingw32'
gem 'libv8', '3.3.10.4'
else
gem 'therubyracer', platforms: 'ruby'
end
end
# gem 'bcrypt-ruby', '~> 3.0.0'
# To use Jbuilder templates for JSON
# gem 'jbuilder'
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
group :test, :development do
gem 'sqlite3'
gem 'haml-rails'
gem 'rspec-rails'
gem 'factory_girl'
gem 'factory_girl_rails'
gem 'capybara'
gem 'database_cleaner'
end
group :test do
gem 'cucumber-rails'
# gem 'mysql2'
end
group :production do
gem 'rails_log_stdout', github: 'heroku/rails_log_stdout'
gem 'rails3_serve_static_assets', github: 'heroku/rails3_serve_static_assets'
# gem 'activerecord-postgresql-adapter'
gem 'pg'
gem 'newrelic_rpm'
end
#gem 'execjs'
#gem 'node'
Does anyone know how to fix it?

Answer 1

Remove this gem 'therubyracer and gem 'libv8', '3.3.10.4'' from the current line and add it below gem 'exception_notification'. is thisif RUBY_PLATFORM =~ /mingw/` validated? Check if the rubyracer gem is installed. run bundle and see if the issue exists