VSCODE what is the error when saving to gulp?

Question

gulp.js

There is an error sometimes when saving when I press Ctrl + S BUT if I press Ctrl + S again, the
gallp will save everything
.
to the included stylesheet I'm working with. And then he stops spitting out and saves everything .. What's wrong with him?

In the main style file, I have the connection of additional styles registered in this way.
@import 'vars';
@import 'fonts';
@import 'global';
@import 'drop-down-menu';

Answer 1

Check the drop-down-menu.scss file for errors