Logging at level: debug Configuration file: /github/workspace/./_config.yml GitHub Pages: github-pages v229 GitHub Pages: jekyll v3.9.4 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 /Gemfile EntryFilter: excluded /Gemfile.lock Generating: JekyllOptionalFrontMatter::Generator finished in 0.000204472 seconds. Generating: JekyllReadmeIndex::Generator finished in 0.001225617 seconds. Generating: Jekyll::Paginate::Pagination finished in 2.805e-06 seconds. github-pages 229 | Error: undefined method `excerpt_separator' for #<Jekyll::Page @name="404.md">