Warning: Running "sass:server" (sass) task
You need to have Ruby and Sass installed and in your PATH for this task to work.
More info: https://github.com/gruntjs/grunt-contrib-sass
Use --force to continue.
You should have ruby, but you can run this to double check "ruby -v"
next run "sass -v" to check do you have sass.
if you get this: "-bash: sass: command not found"
you can use this command to install: "sudo gem install -n /usr/local/bin sass"
please note: if you use "sudo gem install sass" you will get this error:
ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/sass