My github pages site is not applying the bootstrap jekyll theme

Question

My github pages site is not applying the boostrap jekyll theme, instead it looks like basic html.

the site is published here: https://toneman1984.github.io/HeatherBlogV2/

the repository is here: https://github.com/toneman1984/HeatherBlogV2

I feel like it has to do with my _config.yml file, specifically the url and base url settings and/or the settings in GitHub.

these are my config.yml settings:

title:              Clean Blog
email:              your-email@example.com
description:        A Blog Theme by Start Bootstrap
author:             Start Bootstrap
baseurl:            "HeathersBlogV2"
url:                "https://toneman1984.github.io/HeatherBlogV2/"

# Social Profiles
twitter_username:   SBootstrap
github_username:    StartBootstrap
facebook_username:  StartBootstrap
instagram_username:  
linkedin_username:

# Add your google-analytics ID here to activate google analytics
google_analytics:   UA-XXXXXXXXX-X # out your google-analytics code

# Build settings
markdown:           kramdown
paginate:           5
paginate_path:      "/posts/page:num/"
plugins:
  - jekyll-feed
  - jekyll-paginate
  - jekyll-sitemap ## Uncomment this line to silently generate a sitemaps.org compliant sitemap for your Jekyll site

theme: jekyll-theme-clean-blog