Hi,
Welcome to the community!
I have a few questions. First, I think it’s implicit in what you’ve written, but I want to be sure: does your project have a module named postcss-cscc?
Second, do you want to analyze your CSS? Doing so is best-practice, but an easy out should be to simply exclude **/*.css from analysis.
Assuming you do want to analyze CSS, and we need to diagnose and fix this, could you provide a debug analysis log?
The analysis / scanner log is what’s output from the analysis command. Hopefully, the log you provide - redacted as necessary - will include that command as well.
This guide will help you find them.
Ann