Why is it highlighted in red?

Question

Sass

There are classes, but when I copy them to the scss file, they are highlighted in red, I can’t understand why?

Answer 1

Have you resolved the issue?
Here is my solution! Install the SASS plugin, namely SASS, not SCSS (if you had the SCSS plugin installed, remove the plugin so as not to conflict), then select the SASS type

select SCSS and the red line disappears instantly