Logging at level: debug Configuration file: /github/workspace/./_config.yml Theme: jekyll-theme-slate Theme source: /usr/local/bundle/gems/jekyll-theme-slate-0.2.0 GitHub Pages: github-pages v231 GitHub Pages: jekyll v3.9.5 Theme: jekyll-theme-slate Theme source: /usr/local/bundle/gems/jekyll-theme-slate-0.2.0 Requiring: jekyll-seo-tag Requiring: jekyll-coffeescript Requiring: jekyll-commonmark-ghpages Requiring: jekyll-gist Requiring: jekyll-github-metadata Requiring: jekyll-paginate Requiring: jekyll-relative-links Requiring: jekyll-optional-front-matter Requiring: jekyll-readme-index Requiring: jekyll-default-layout Requiring: jekyll-titles-from-headings GitHub Metadata: Initializing... Source: /github/workspace/. Destination: /github/workspace/./_site Incremental build: disabled. Enable with --incremental Generating... Generating: JekyllOptionalFrontMatter::Generator finished in 0.000285103 seconds. Generating: JekyllReadmeIndex::Generator finished in 0.001637359 seconds. Generating: Jekyll::Paginate::Pagination finished in 6.241e-06 seconds. Generating: JekyllRelativeLinks::Generator finished in 0.000140743 seconds. Generating: JekyllDefaultLayout::Generator finished in 0.000117309 seconds. Requiring: kramdown-parser-gfm Generating: JekyllTitlesFromHeadings::Generator finished in 0.009524556 seconds. Rendering: assets/css/style.scss Pre-Render Hooks: assets/css/style.scss Rendering Markup: assets/css/style.scss Rendering: docs/docs/index.md Pre-Render Hooks: docs/docs/index.md Rendering Liquid: docs/docs/index.md github-pages 231 | Error: Liquid syntax error (line 22): Unknown tag 'extends'