I had the exact same issue. What fixed it for me was what the parent said of adding this line, too:

config.sass.compress = false

Clear you cached assets, restart your server and reload the page. That should hopefully fix it for you.

You're getting a ..:14 because Chrome is looking for the SASS files but is unable to, due to the lack of media query in the CSS file.

Here's a prefix example your css should output: @media -sass-debug-info{filename{font-family:file\:\/\/\/Users\/kai\/Play\/live\/screen\.scss}line{font-family:\0000311}} .box { .. }

Hope this helps other understand why this occurs! :)