sass

I'm trying to run my jekyll site locally and getting the following error.

$ bundle exec jekyll serve
WARNING: Nokogiri was built against LibXML version 2.9.10, but has dynamically loaded 2.9.9
  Jekyll Spaceship: 🚀 Jekyll-Spaceship 0.9.1
  Jekyll Spaceship: 🎉 A Jekyll plugin to provide powerful supports.
  Jekyll Spaceship: 👉 https://github.com/jeffreytse/jekyll-spaceship
Configuration file: /home/pepp/myproj.gitlab.io/_config.yml
  Dependency Error: Yikes! It looks like you don't have sass or one of its dependencies installed. In order to use Jekyll as currently configured, you'll need to install this gem. The full error message from Ruby is: 'cannot load such file -- sass' If you run into trouble, you can find helpful resources at https://jekyllrb.com/help/!
jekyll 3.8.5 | Error:  sass

After installing sass, I still get the same error above.

$ sudo gem install sass
Password:

Ruby Sass has reached end-of-life and should no longer be used.

* If you use Sass as a command-line tool, we recommend using Dart Sass, the new
  primary implementation: https://sass-lang.com/install

* If you use Sass as a plug-in for a Ruby web framework, we recommend using the
  sassc gem: https://github.com/sass/sassc-ruby#readme

* For more details, please refer to the Sass blog:
  https://sass-lang.com/blog/posts/7828841

Successfully installed sass-3.7.4
Parsing documentation for sass-3.7.4
Done installing documentation for sass after 3 seconds
1 gem installed