Undefined method ‘task’ using Rake 0.9.0
As explained in mordaroso’s answer, there is a problem in Rake 0.9.0. You need to temporarily downgrade Rake in order to avoid it: run: gem uninstall rake -v 0.9 (add sudo unless you use rvm) add to your Gemfile: gem ‘rake’, ‘~> 0.8.7’ and then run: bundle update You can skip the first step, but … Read more