Logging at level: debug GitHub Pages: github-pages v231 GitHub Pages: jekyll v3.9.5 Theme: jekyll-theme-primer Theme source: /usr/local/bundle/gems/jekyll-theme-primer-0.6.0 Requiring: jekyll-github-metadata 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... EntryFilter: excluded /CNAME Generating: JekyllOptionalFrontMatter::Generator finished in 9.7571e-05 seconds. Generating: JekyllReadmeIndex::Generator finished in 0.001416484 seconds. Generating: Jekyll::Paginate::Pagination finished in 3.096e-06 seconds. Generating: JekyllRelativeLinks::Generator finished in 0.000106447 seconds. Generating: JekyllDefaultLayout::Generator finished in 7.4438e-05 seconds. Requiring: kramdown-parser-gfm Generating: JekyllTitlesFromHeadings::Generator finished in 0.007985274 seconds. Rendering: site/index.md Pre-Render Hooks: site/index.md Rendering Liquid: site/index.md github-pages 231 | Error: Liquid error (line 1): Cannot sort a null object.