Active support error when loading rails server/console?

Hi, I cloned a git repo and then loaded up my terminal and typed: rails server. It's worked normally but this time I keep on getting the error:

<-[31mCould not find activesupport-3.0.5 in any of the sources<-[0m

anyone know why this is?

(can't fire up rails console either)

The application is using bundler and requires Rails 3.0.5. Please install bundler if you do not have it, and run bundle install in the application root.