This repository is an experimental work-in-progress and is being done on Linux. I don’t have time (or equipment/licenses) to test on Windows. If you’d like to you’re welcome to, but you’ll be a test pilot and need to solve any problems yourself.
If you do solve problems feel free to report what you did.
Unfortunately, in this report you haven’t made it clear what you did or what the symptoms of the problem are, so even someone who is familiar with llvm and Windows (it’s not me) doesn’t have information necessary to help you.
I’d definitely recommend that you stick to Linux, preferably Ubuntu for now. I’ve given exact instructions that can be copied&pasted on specified systems and are known to work there.