Столкнулся с проблемой версионности Rake и как следствие получил вот такую ошибку.
rake aborted!
Gem::LoadError: You have already activated rake 10.3.2, but your Gemfile requires rake 10.1.1. Prepending `bundle exec` to your command may solve this.
Gem::LoadError: You have already activated rake 10.3.2, but your Gemfile requires rake 10.1.1. Prepending `bundle exec` to your command may solve this.