bundle exec jekyll build is failed

[syutadeveloper]

I tried to bulid/run jekyll to check my article which is Call For Host openSUSE.Asia Summit 2023.
But it had error.

Do I miss anything else?

environment

openSUSE Leap 15.4

reproduce

$ git clone https://github.com/openSUSE/news-o-o.git
$ docker run -it -v $(pwd)/news-o-o:/mnt/news -p 4000:4000 ruby sh
# cd mnt/news
# bundle install --path vendor/bundle
# bundle exec jekyll build

error message

sorry for long....

Configuration file: /mnt/news/_config.yml
            Source: /mnt/news
       Destination: /mnt/news/_site
 Incremental build: disabled. Enable with --incremental
      Generating... 
  Liquid Exception: undefined method `tainted?' for "":String in /mnt/news/_layouts/post.html
                    ------------------------------------------------
      Jekyll 4.1.0   Please append `--trace` to the `build` command 
                     for any additional information or backtrace. 
                    ------------------------------------------------
/mnt/news/vendor/bundle/ruby/3.2.0/gems/liquid-4.0.3/lib/liquid/variable.rb:124:in `taint_check': undefined method `tainted?' for "":String (NoMethodError)

      return unless obj.tainted?
                       ^^^^^^^^^
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/liquid-4.0.3/lib/liquid/variable.rb:89:in `render'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/liquid-4.0.3/lib/liquid/block_body.rb:103:in `render_node_to_output'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/liquid-4.0.3/lib/liquid/block_body.rb:80:in `render'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/liquid-4.0.3/lib/liquid/template.rb:208:in `block in render'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/liquid-4.0.3/lib/liquid/template.rb:242:in `with_profiling'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/liquid-4.0.3/lib/liquid/template.rb:207:in `render'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/liquid-4.0.3/lib/liquid/template.rb:220:in `render!'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/liquid_renderer/file.rb:39:in `block (3 levels) in render!'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/liquid_renderer/file.rb:59:in `measure_counts'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/liquid_renderer/file.rb:38:in `block (2 levels) in render!'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/liquid_renderer/file.rb:63:in `measure_bytes'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/liquid_renderer/file.rb:37:in `block in render!'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/liquid_renderer/file.rb:70:in `measure_time'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/liquid_renderer/file.rb:36:in `render!'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/renderer.rb:127:in `render_liquid'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/renderer.rb:190:in `render_layout'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/renderer.rb:159:in `place_in_layouts'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/renderer.rb:89:in `render_document'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/renderer.rb:63:in `run'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/site.rb:532:in `render_regenerated'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/site.rb:517:in `block (2 levels) in render_docs'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/site.rb:516:in `each'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/site.rb:516:in `block in render_docs'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/site.rb:515:in `each_value'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/site.rb:515:in `render_docs'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/site.rb:207:in `render'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/site.rb:80:in `process'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/command.rb:28:in `process_site'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/commands/build.rb:65:in `build'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/commands/build.rb:36:in `process'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/command.rb:91:in `block in process_with_graceful_fail'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/command.rb:91:in `each'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/command.rb:91:in `process_with_graceful_fail'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/lib/jekyll/commands/build.rb:18:in `block (2 levels) in init_with_program'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `block in execute'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `each'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `execute'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/mercenary-0.4.0/lib/mercenary/program.rb:44:in `go'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/mercenary-0.4.0/lib/mercenary.rb:21:in `program'
        from /mnt/news/vendor/bundle/ruby/3.2.0/gems/jekyll-4.1.0/exe/jekyll:15:in `<top (required)>'
        from /mnt/news/vendor/bundle/ruby/3.2.0/bin/jekyll:25:in `load'
        from /mnt/news/vendor/bundle/ruby/3.2.0/bin/jekyll:25:in `<top (required)>'
        from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:58:in `load'
        from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:58:in `kernel_load'
        from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:23:in `run'
        from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:492:in `exec'
        from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
        from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
        from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
        from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:34:in `dispatch'
        from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
        from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:28:in `start'
        from /usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.10/libexec/bundle:45:in `block in <top (required)>'
        from /usr/local/lib/ruby/3.2.0/bundler/friendly_errors.rb:117:in `with_friendly_errors'
        from /usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.10/libexec/bundle:33:in `<top (required)>'
        from /usr/local/bin/bundle:25:in `load'
        from /usr/local/bin/bundle:25:in `<main>'

I couldn't run it on Leap 15.4 because of nokogiri ver.
so I did it on docker.

thanks.