Sass Error - Unexpected character sequence

[imsam67]

I tried to incorporate the sass into my app's css as my app already uses sass. Dropped the sass files next to my other sass files and added the imports into the main file. When I started the process, I got this error:

When I hover over where I'm getting the error, I get the "unexptected character sequence". I'm not a css or sass expert. Looks like my IDE (Visual Studio) is not liking when -- see below:

Could you please tell me how to handle this so that I can incorporate your work into my app? Thanks