Unable to use Minima dark in Github Pages

Hey,
I’m trying to set the skin of minima’s theme to dark.
It changed successfully when I launched it on my computer.
But on Github pages, it seems default.
I added these lines:
theme: minima
minima:
skin: dark

And even tried this:

remote_theme: jekyll/minima

Nothing works, I would like someone to help me if he faced the same problem.

Hello tal4,

Did you have wait some times before you use your GitHub Pages?

local - my way

git clone https://github.com/son-link/jekyll-simple-dark.git
cd jekyll-simple-dark
bundle exec jekyll serve
gem install "bundler"
gem install bundler -v 1.12.0
gem install rake
gem install bundler -v 1.17.3
gem install bundler -v 1.16.1 
bundle _1.17.3_ install

rm Gemfile.lock
nano Gemfile
### add to Gemfiel ----> gem "kramdown-parser-gfm"
bundle exec jekyll serve --open-url --livereload

git

git init
git add .
git commit -m "initial commit"