Getting this error? ... Scroll down to my solution.
/var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `require': cannot load such file -- celluloid (LoadError)
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `block in require'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in `load_dependency'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `require'
from /var/lib/gems/1.9.1/gems/activemessaging-0.12.1/lib/activemessaging/threaded_poller.rb:7:in `<top (required)>'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `require'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `block in require'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in `load_dependency'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `require'
from /var/lib/gems/1.9.1/gems/activemessaging-0.12.1/lib/activemessaging.rb:49:in `load_extensions'
from /var/lib/gems/1.9.1/gems/activemessaging-0.12.1/lib/activemessaging.rb:99:in `load_activemessaging'
from /var/lib/gems/1.9.1/gems/activemessaging-0.12.1/lib/activemessaging/railtie.rb:10:in `block in <class:Railtie>'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/initializable.rb:30:in `instance_exec'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/initializable.rb:30:in `run'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/initializable.rb:55:in `block in run_initializers'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/initializable.rb:54:in `each'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/initializable.rb:54:in `run_initializers'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/application.rb:136:in `initialize!'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/razimi/Documents/PROJEK/RUBY/messages/config/environment.rb:5:in `<top (required)>'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `require'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `block in require'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in `load_dependency'
from /var/lib/gems/1.9.1/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `require'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/application.rb:103:in `require_environment!'
from /var/lib/gems/1.9.1/gems/railties-3.2.12/lib/rails/commands.rb:25:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
#> gem install bundler
Fetching: bundler-1.2.4.gem (100%)
Fetching: bundler-1.2.4.gem (100%)
Successfully installed bundler-1.2.4
1 gem installed
Installing ri documentation for bundler-1.2.4...
Installing RDoc documentation for bundler-1.2.4...
