getting started, unknown command 'github-pages'

[kguion1]

Hi, I am excited to use your jekyll theme! I am new to jekyll and am a little confused on how to setup my first website.

I forked your repository and changed the settings to land at my kguion1.github.io website. However, the page is not loading and I am getting emails from github that the pages are failing to build and deploy. I do not know where to look to debug this.

I did reinstall ruby and jekyll.
gem -v 3.1.2
jekyll -v 4.2.1

I also attempted to run the line of code gem "github-pages", group: :jekyll_plugins that you suggested and received the following error:

Any help is greatly appreciated! As I said I am new to this and appreciate your patience if any of my questions are a little basic.

Thank you!