cannot load such file -- unicode (LoadError)

I’m new to RoR and working on a migration of project developed by another team. I’m using Rails version (3.2.13) and my bundle install works successfully. However while running “rails server”, I get the error below.

Any suggestions are most appreciated.

Thanks!

-------------- rails server output --------------

C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2. 13/lib/active_support/dependencies.rb:251:in require': cannot load such file -- unicode (LoadError) from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activ esupport-3.2.13/lib/active_support/dependencies.rb:251:in block in require’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activ esupport-3.2.13/lib/active_support/dependencies.rb:236:in load_dependency' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activ esupport-3.2.13/lib/active_support/dependencies.rb:251:in require’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/fog-1 .16.0/lib/fog/aws.rb:4:in <top (required)>' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activ esupport-3.2.13/lib/active_support/dependencies.rb:251:in require’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activ esupport-3.2.13/lib/active_support/dependencies.rb:251:in block in require' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activ esupport-3.2.13/lib/active_support/dependencies.rb:236:in load_dependency’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activ esupport-3.2.13/lib/active_support/dependencies.rb:251:in require' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/fog-1 .16.0/lib/fog.rb:9:in <top (required)>’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/bundl er-1.3.5/lib/bundler/runtime.rb:72:in require' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/bundl er-1.3.5/lib/bundler/runtime.rb:72:in block (2 levels) in require’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/bundl er-1.3.5/lib/bundler/runtime.rb:70:in each' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/bundl er-1.3.5/lib/bundler/runtime.rb:70:in block in require’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/bundl er-1.3.5/lib/bundler/runtime.rb:59:in each' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/bundl er-1.3.5/lib/bundler/runtime.rb:59:in require’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/bundl er-1.3.5/lib/bundler.rb:132:in require' from C:/Projects/zengine1/ninja/config/application.rb:13:in <top (requi red)>’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railt ies-3.2.13/lib/rails/commands.rb:53:in require' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railt ies-3.2.13/lib/rails/commands.rb:53:in block in <top (required)>’ from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railt ies-3.2.13/lib/rails/commands.rb:50:in tap' from C:/software/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railt ies-3.2.13/lib/rails/commands.rb:50:in <top (required)>’ from script/rails:6:in require' from script/rails:6:in