# SASS & Themes and local vs Github

**URL:** <https://talk.jekyllrb.com/t/sass-themes-and-local-vs-github/3211>\
**Category:** Help\
**Created:** [August 18, 2019, 12:10am UTC](https://talk.jekyllrb.com/t/sass-themes-and-local-vs-github/3211 "2019-08-18T00:10:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ChrisMcG](https://avatars.discourse-cdn.com/v4/letter/c/a698b9/32.png) [@ChrisMcG](https://talk.jekyllrb.com/u/ChrisMcG)\
**Post date:** [August 18, 2019, 12:10am UTC](https://talk.jekyllrb.com/t/sass-themes-and-local-vs-github/3211/1 "2019-08-18T00:10:55Z")

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Hi

I am completing the tutorial on Jekyll. I have run into trouble with the CSS/SASS.

When running it locally using `bundle exec jekyll serve` I get an error message saying it cannot find it.

When I run it on GitHub I think it defaults to a theme listed the `_config.yml`. I have two questions - does the theme override the CSS call in `_layouts\default.html`? How do I get the page to find the css/sass file. Github repository here -\> [https://github.com/WhenTheTideGoesOut/WhenTheTideGoesOut.github.io](https://github.com/WhenTheTideGoesOut/WhenTheTideGoesOut.github.io)  
Any help would be great.