Error AtlasError Documentation and Resolution
Back to search

GitHub Pages

GitHub Pages Jekyll build failed because an invalid highlighter language was used

Invalid highlighter language

GitHub Pages could not build the Jekyll site because a code block or highlighting configuration references a language that the site highlighter does not recognize.

Invalid highlighter languagebuild errors

Observed message

Invalid highlighter language

Why it happens

  • A code block specifies an unsupported or misspelled syntax highlighting language.
  • The highlighting configuration references an invalid language name.
  • A custom or nonstandard highlighter identifier is being used.

How to fix it

  1. Replace the invalid language name with one supported by the configured highlighter.
  2. Check fenced code block annotations for typos.
  3. Retry the build after removing or correcting unsupported highlighting settings.

Official reference

GitHub Docs: Troubleshooting Jekyll build errors for GitHub Pages sites

Related errors

Date is not a valid datetimeGitHub Pages Jekyll build failed because a date is not a valid datetimeFile does not exist in includes directoryGitHub Pages Jekyll build failed because a file does not exist in the includes directoryFile is not properly UTF-8 encodedGitHub Pages Jekyll build failed because a file is not properly UTF-8 encodedInvalid post dateGitHub Pages Jekyll build failed because a post has an invalid post date

Explore more

build errorsBrowse more build errors errors
GitHub Pages invalid highlighter language: causes and fixes | Error Atlas