I had first to change my Gemfile from (I deleted the comments to make the text shorter):
source 'https://rubygems.org' gem 'rails', '4.2.0' gem 'sqlite3' gem 'sass-rails', '~> 5.0' gem 'uglifier', '>= 1.3.0' gem 'coffee-rails', '~> 4.1.0' gem 'jquery-rails' gem 'turbolinks' gem 'jbuilder', '~> 2.0' gem 'sdoc', '~> 0.4.0', group: :doc group :development, :test do gem 'byebug' gem 'web-console', '~> 2.0' gem 'spring' end to:
source 'https://rubygems.org' gem 'rails', '4.2.0' gem 'sass-rails', '5.0.1' gem 'uglifier', '2.5.3' gem 'coffee-rails', '4.1.0' gem 'jquery-rails', '4.0.3' gem 'turbolinks', '2.3.0' gem 'jbuilder', '2.2.3' gem 'sdoc', '0.4.0', group: :doc group :development, :test do gem 'sqlite3', '1.3.9' gem 'byebug', '3.4.0' gem 'web-console', '2.0.0.beta3' gem 'spring', '1.1.3' end now when I try to run the rails server with rails server -b $IP -p $PORT I get following error message:
/usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass/rails/helpers.rb:11:in `': uninitialized constant Sass::Script (NameError) from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass/rails.rb:8:in `require' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass/rails.rb:8:in `' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass-rails.rb:1:in `require' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass-rails.rb:1:in `' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:76:in `require' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:72:in `each' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:72:in `block in require' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:61:in `each' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:61:in `require' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler.rb:133:in `require' from /home/ubuntu/workspace/hello_app/config/application.rb:7:in `' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:78:in `require' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:78:in `block in server' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands.rb:17:in `' from /home/ubuntu/workspace/hello_app/bin/rails:8:in `require' from /home/ubuntu/workspace/hello_app/bin/rails:8:in `' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `load' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `call' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/client.rb:26:in `run' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/bin/spring:48:in `' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `' from /home/ubuntu/workspace/hello_app/bin/spring:13:in `require' from /home/ubuntu/workspace/hello_app/bin/spring:13:in `' from bin/rails:3:in `load' from bin/rails:3:in `' I tried the running the servers before changing the Gemfile, and it works, so it must be because of the new changes. Also I'm aware in the error it says ruby-2.1.5, and in my Gemfile I put 4.2.0 but I have no clue how to change this, or if this is even the problem? i tried to add ruby '2.1.5' under the source line, nothing changed. Also I changed 'rails', '4.2.0' to 2.1.5 but then the update failed telling me Could not find gem 'rails (= 2.1.5) ruby' in the gems available on this machine.