Error while running RAILS server on Gitbash

Question

I am new to Ruby on Rails and I was trying to learn it using the youtube videos and I have installed Heroku, Postgre SQL, Git Bash and trying to run the Rails Server and getting the following error.

Can you guys help me out on this? There was similar issue posted here I tried using the resolution provided there but it did not work.

• Tried uncommening the # gem 'therubyracer', platforms: :ruby that did not work

• People mentioned that we need to install Nodejs although I have nodejs in my system I am not using it should I install it even though I am not going to use it?

Please help me on this.

$ rails s

c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:85:in rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError) Gem Load Error is: Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. Backtrace for gem load error is: c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:58:inautodetect' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/execjs-2.7.0/lib/execjs.rb:5:in <module:ExecJS>' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/execjs-2.7.0/lib/execjs.rb:4:in' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/uglifier-4.1.10/lib/uglifier.rb:5:in require' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/uglifier-4.1.10/lib/uglifier.rb:5:in' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:82:in require' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:82:inblock (2 levels) in require' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:77:in each' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:77:inblock in require' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:66:in each' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:66:inrequire' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler.rb:108:in require' c:/Sites/myrubyblog/config/application.rb:7:in' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:133:in require' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:133:inblock in perform' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:130:in tap' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:130:inperform' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor/command.rb:27:in run' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:ininvoke_command' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor.rb:387:in dispatch' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/command/base.rb:63:inperform' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/command.rb:44:in invoke' c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands.rb:16:in' bin/rails:4:in require' bin/rails:4:in' Bundler Error Backtrace: from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:81:in block (2 levels) in require' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:77:ineach' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:77:in block in require' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:66:ineach' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/runtime.rb:66:in require' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler.rb:108:inrequire' from c:/Sites/myrubyblog/config/application.rb:7:in <top (required)>' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:133:inrequire' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:133:in block in perform' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:130:intap' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:130:in perform' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor/command.rb:27:inrun' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in invoke_command' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor.rb:387:indispatch' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/command/base.rb:63:in perform' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/command.rb:44:ininvoke' from c:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands.rb:16:in <top (required)>' from bin/rails:4:inrequire' from bin/rails:4:in `'

Answer 1

Installing NodeJS should fix your issue.

You can install it using the installer here: https://nodejs.org/en/download/

Or use sudo apt-get install NodeJS or equivalent, depending on your system, on the command line

Answer 2

The error is "Cannot Find a Javascript Runtime" because you are using Uglifier.

Uglifier is a JS wrapper and it needs a JS runtime running.

NodeJS is my recommendation.