Error: Could not find rake-x.x.x in any of the sources... Run `bundle install` to install missing gems.

Could not find rake-x.x.x in any of the sources...
Run bundle install to install missing gems.`

if using rbenv, run rbenv rehash

Source: https://stackoverflow.com/questions/9694219/after-installing-rbenv-and-changing-ruby-version-rake-no-longer-runs/21034433#21034433