Install github-pages rather than jekyll directly to avoid dependency issues.

Author: hategan

web/Gemfile

@@ -7,7 +7,10 @@ source "https://rubygems.org"
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem "jekyll", "~> 4.3.1"
+
+#gem "jekyll", "~> 4.3.1"
+gem "github-pages", "~> 228", group: :jekyll_plugins
+
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 gem "minima", "~> 2.5"
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and