Theme needs update?

[ghost]

I added a default Gemfile because there isn't one provided. Here I added the plugin.

# frozen_string_literal: true

source "https://rubygems.org"

git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
# Hello! This is where you manage which Jekyll version is used to run.
# When you want to use a different version, change it below, save the
# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
#
#     bundle exec jekyll serve
#
# This will help ensure the proper Jekyll version is running.
# Happy Jekylling!
gem "jekyll", "~> 3.7.3"

# This is the default theme for new Jekyll sites. You may change this to anything you like.
gem "minima", "~> 2.0"

# If you want to use GitHub Pages, remove the "gem "jekyll"" above and
# uncomment the line below. To upgrade, run `bundle update github-pages`.
# gem "github-pages", group: :jekyll_plugins

# If you have any plugins, put them here!
group :jekyll_plugins do
  gem "jekyll-paginate"
end

Tried to serve

$ gem install jekyll-paginate
Fetching: jekyll-paginate-1.1.0.gem (100%)
Successfully installed jekyll-paginate-1.1.0
Parsing documentation for jekyll-paginate-1.1.0
Installing ri documentation for jekyll-paginate-1.1.0
Done installing documentation for jekyll-paginate after 0 seconds
1 gem installed
Roberts-iMac:rob-nash.github.io robertnash$ jekyll serve
Configuration file: /Users/robertnash/Code/rob-nash.github.io/_config.yml
            Source: .
       Destination: ./_site
 Incremental build: disabled. Enable with --incremental
      Generating... 
       Deprecation: You are using 'kramdown.coderay' in your configuration, please use 'syntax_highlighter_opts' instead.
       Deprecation: You are using 'coderay_wrap'. Normalizing to wrap.
       Deprecation: You are using 'coderay_line_numbers'. Normalizing to line_numbers.
       Deprecation: You are using 'coderay_line_number_start'. Normalizing to line_number_start.
       Deprecation: You are using 'coderay_tab_width'. Normalizing to tab_width.
       Deprecation: You are using 'coderay_bold_every'. Normalizing to bold_every.
       Deprecation: You are using 'coderay_css'. Normalizing to css.
                    done in 1.511 seconds.
 Auto-regeneration: enabled for '.'
    Server address: http://127.0.0.1:4000http://jamigibbs.github.io/phantom//
  Server running... press ctrl-c to stop.
[2018-05-08 15:33:35] ERROR `/' not found.
[2018-05-08 15:33:50] ERROR `/' not found.
[2018-05-08 15:33:50] ERROR `/favicon.ico' not found.