Before I begin I want to say I'm on Windows 10 so it might be a Windows specific issue

I was working on a site and couldn't for the life of me get PostCSS to work in Hugo Pipes. I kept getting the following error

It didn't work until I realized the error was showing the wrong directory name. It was showing "D:\Modii\Projects\Contentful " instead of "D:\Modii\Projects\Contentful Starter\contentful-hugo-starter"

My folder structure looks like this:

└── Projects
    └── Contentful Starter
        └── contentful-hugo-starter
            ├── assets/
            │   └── sass/
            │       └── main.scss
            ├── content/
            ├── layouts/
            ├── config.toml
            ├── postcss.config.js
            └── rest_of_my_hugo_files

When I removed the space in the parent directory "Contentful Starter" changing it to "contentful-starter" it began to work properly. So it seems to me Hugo just is having a problem navigating the file structure when one of the files has a space in its name.

PS: Also I did test using Hugo pipes with PostCSS and without. This issue only arises when using PostCSS from my experience.