У меня никогда не было проблем с запуском нового приложения, но сегодня я получил сообщение об ошибке, когда я пытался запустить rails new murphy
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:59:in `gem_original_require': no such file to load -- active_support/core_ext/object/singleton_class (LoadError)
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:59:in `require'
from /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta2/lib/rails/generators.rb:6
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `gem_original_require'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `require'
from /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta2/lib/rails/commands/application.rb:10
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `gem_original_require'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `require'
from /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta2/bin/rails:30
from /usr/local/bin/rails:19:in `load'
from /usr/local/bin/rails:19