bcrypt error: Devise ruby 2.0 and rails 4.0

Question

I keep getting this error when i try to run my app:

C:/ruby-2.0.0-p195-i386-mingw32/lib/ruby/gems/2.0.0/gems/activesupport-4.0.0.rc1 /lib/active_support/dependencies

Answer 1

The new version of bundler just came out. It nows about x64 gems

gem install bundler -v '1.4.0.pre.2'