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GitHub Pages Jekyll build failed because Sass or SCSS is invalid

Invalid Sass or SCSS

GitHub Pages could not build the Jekyll site because a Sass or SCSS stylesheet contains syntax errors that prevent preprocessing.

Invalid Sass or SCSSbuild errors

Observed message

Invalid Sass or SCSS

Why it happens

  • A Sass or SCSS file contains invalid syntax.
  • A referenced import or variable is malformed.
  • The stylesheet structure does not match what the preprocessor expects.

How to fix it

  1. Validate the affected Sass or SCSS file for syntax issues.
  2. Check imports, variables, nesting, and missing delimiters.
  3. Rebuild after correcting the stylesheet error shown in the build log.

Official reference

GitHub Docs: Troubleshooting Jekyll build errors for GitHub Pages sites

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