asciidoctor-diagram fails to find dot.exe

Although I'm not sure if this is right place to post this but as I've summarized in the title, after following the instructions to enable the asciidoctor-diagram in .adoc files, the extension fails to find dot.exe, throwing the errors below;

asciidoctor: ERROR: 2017-05-20-diagram-in-a-post.adoc: line 8: Failed to generate image: Could not find the 'dot' executable in PATH; add it to the PATH or specify its location using the 'graphvizdot' document attribute
asciidoctor: ERROR: 2017-05-20-diagram-in-a-post.adoc: line 18: Failed to generate image: no implicit conversion of nil into String
asciidoctor: ERROR: ascii-sampleDiagram.adoc: line 7: Failed to generate image: Could not find Java executable

You can find my build in my repo either in the main branch (also my working branch) or the source branch (where my github page gets built/deployed), but in my gem file I have;

source 'https://rubygems.org'
gem 'jekyll', '~> 4.2'
gem 'jekyll-include-cache', group: :jekyll_plugins

# If you have any plugins, put them here!
group :jekyll_plugins do
  gem 'kramdown-parser-gfm' if ENV['JEKYLL_VERSION'] == '~> 3.9'
  gem 'asciidoctor-diagram', '~> 2.2', '>= 2.2.1'
  gem 'jekyll-asciidoc', github: 'asciidoctor/jekyll-asciidoc'
  gem 'minitest', '~> 5.14', '>= 5.14.4'
  gem 'rake', '~> 13.0', '>= 13.0.6'
  gem 'minima', '~> 2.5'
  gem 'jemoji', '~> 0.12.0'
  gem 'titleize', '~> 1.4', '>= 1.4.1'
  gem 'jekyll-remote-theme', '~> 0.4.3'
  gem 'jekyll-timeago', '~> 0.13.1'
  gem 'jekyll-feed', '~> 0.12'
  gem 'jekyll-sitemap', '~>1.4'
  gem 'jekyll-archives', '~> 2.2', '>= 2.2.1'
  gem 'jekyll-scholar', '~> 7.0'
  gem 'jekyll-webp', '~> 1.0'
  gem 'jekyll-loading-lazy', '~> 0.1.1'
  gem 'jekyll_figure', '~> 0.0.3'
end

platforms :mingw, :x64_mingw, :mswin, :jruby do
  gem 'tzinfo', '~> 1.2'
  gem 'tzinfo-data'
end

gem 'wdm', '~> 0.1.1', :platforms => [:mingw, :x64_mingw, :mswin]
gem 'eventmachine', '1.2.7', git: 'https://github.com/eventmachine/eventmachine.git', tag: 'v1.2.7'

and my config is as follows;

############################################################
# Plugins (previously gems)
plugins:
 - asciidoctor-diagram
 - jekyll-asciidoc
 - jekyll-feed
 - jekyll-seo-tag
 - jekyll-remote-theme
 - jekyll-include-cache
 - jekyll-archives
 - jekyll/scholar
 - jekyll-webp
 - jekyll-loading-lazy
 - jekyll_figure
 - jemoji
 - titleize

############################################################
# Site configuration for the Jekyll-AsciiDoc Plugin
keep_files:
  - images

asciidoc: {}
asciidoctor:
  base_dir: :docdir
  safe: unsafe
  attributes:
    imagesdir: assets/img/ascii
    stem: ''
    :page-layout: auto@

I'll also add the steps I've taken to address the problem in no particular order;

installed graphviz-2.50.0 (64-bit) from the graphviz.org website w/ graphviz PATH added to all users
manually added C:\Program Files\Graphviz\bin dir to the windows 10 environment paths and placed it above the ruby27-x64 PATH.
checked-out issue #142 and tried this
followed the instructions on How to configure Asciidoctor Diagram in a Jekyll site gist

Any help is much appreciated!

asciidoctor / jekyll-asciidoc

asciidoctor-diagram fails to find dot.exe #273