How to resolve "You need to have Ruby and Sass installed and in your PATH for this task to work" Warning?
Ok I got it. I just had to install Sass using gem install sass
and now everything is fine...couldn't be easier.
If you're on OSX El Capitan or Yosemite on Mac there seem to be an issue installing the gem.
Try
sudo gem install -n /usr/local/bin sass
Solution was from github.
You need to install Ruby and Sass as:
For Ruby use command
sudo apt-get install ruby-full
And for Sass use command
sudo gem install sass