Give an error when i comment something in my scss. Without autoprefixer it works normally. I try gulp-autoprefixer v.9.0.0 it needs EMS. I acualy dont now how to do this. And with v.7.x.x or v.8.x.x it gives this error. How to fix this?
[[[no](https://i.stack.imgur.com/veJAK.png)](https://i.stack.imgur.com/y3hKA.png)](https://i.stack.imgur.com/71Fe0.png)
