jekyll-4.1.1

$ bundle exec jekyll serve
WARNING: Nokogiri was built against LibXML version 2.9.10, but has dynamically loaded 2.9.9
  Jekyll Spaceship: 🚀 Jekyll-Spaceship 0.9.1
  Jekyll Spaceship: 🎉 A Jekyll plugin to provide powerful supports.
  Jekyll Spaceship: 👉 https://github.com/jeffreytse/jekyll-spaceship
Configuration file: /home/pepp/myproj.gitlab.io/_config.yml
  Jekyll Spaceship: 🗂  use table-processor
  Jekyll Spaceship: 🗂  use mathjax-processor
  Jekyll Spaceship: 🗂  use plantuml-processor
  Jekyll Spaceship: 🗂  use mermaid-processor
  Jekyll Spaceship: 🗂  use polyfill-processor
  Jekyll Spaceship: 🗂  use media-processor
  Jekyll Spaceship: 🗂  use emoji-processor
  Jekyll Spaceship: 🗂  use element-processor
            Source: /home/pepp/myproj.gitlab.io
       Destination: /home/pepp/myproj.gitlab.io/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
       Jekyll Feed: Generating feed for posts
  Jekyll Spaceship: [MermaidProcessor] index.md
  Jekyll Spaceship: [TableProcessor] index.md
  Jekyll Spaceship: [TableProcessor] docs/status/status.md
  Conversion error: Jekyll::Converters::Scss encountered an error while converting 'assets/css/just-the-docs-dark.scss':
                    Error: Undefined variable: "$feedback-color". on line 156:10 of ../../../../../usr/lib64/ruby/gems/2.5.0/gems/just-the-docs-0.3.1/_sass/layout.scss from line 10:9 of ../../../../../usr/lib64/ruby/gems/2.5.0/gems/just-the-docs-0.3.1/_sass/modules.scss from line 4:9 of just-the-docs-dark.scss >> rgba($feedback-color, 1) 0%, ---------^
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      Jekyll 4.1.1   Please append `--trace` to the `serve` command
                     for any additional information or backtrace.
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