build error fix

Gemfile

@@ -1,15 +1,10 @@
 source "https://rubygems.org"
-# 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", "~> 4.1.1"
+
+gem "jekyll", "~> 4.3.3"
+
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
-gem "just-the-docs", github:"pmarsceill/just-the-docs"
+#gem "just-the-docs", github:"pmarsceill/just-the-docs"
+gem "just-the-docs", "~> 0.6.2"
 # 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
@@ -21,13 +16,13 @@ end
 
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
 # and associated library.
-platforms :mingw, :x64_mingw, :mswin, :jruby do
-  gem "tzinfo", "~> 1.2"
-  gem "tzinfo-data"
-end
+#platforms :mingw, :x64_mingw, :mswin, :jruby do
+  #gem "tzinfo", "~> 1.2"
+  #gem "tzinfo-data"
+#end
 
 # Performance-booster for watching directories on Windows
-gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
+#gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
 
 
 gem "webrick", "~> 1.7"

_config.yml

@@ -28,7 +28,9 @@ twitter_username: jekyllrb
 github_username:  jekyll
 
 # Build settings
-remote_theme: pmarsceill/just-the-docs
+#remote_theme: pmarsceill/just-the-docs
+theme: just-the-docs
+url: https://just-the-docs.github.io
 plugins:
   - jekyll-feed
 color_scheme: eeglab