EDIT: If I change SW registration to: -

navigator.serviceWorker.register('/Brotkrumen/echo.js')

I get the Install event but ServiceWorker is never READY.

If you run my Brotkrumen PWA from GitHub Pages you'll see from the console log that I get a PWA Install Event and everything is peachy (I'm writing the nice install pop up this w/e). The Lighthouse audit is all green.

The problem is when I run the same code from the local copy of the repository: -

http://localhost:3333/brotkrumen/travelmanager.html

I get this error: -

This is my manifest: -

{
  "short_name": "Brotkrumen",
  "name": "Brotkrumen Web App",
  "description": "Native Background Geolocation POC",
  "icons": [
    {
      "src": "gingerbreadhouse.png",
      "sizes": "48x48 128x128 144x144 192x192 512x512",
      "type": "image/png",
      "purpose": "any"
    },
    {
      "src": "gingerbreadhouse.png",
      "sizes": "48x48 128x128 144x144 192x192 512x512",
      "type": "image/png",
      "purpose": "maskable"
    }
  ],
  "start_url": "/Brotkrumen/TravelManager.html",
  "background_color": "#00ccdd",
  "theme_color": "#00ccdd",
  "display": "fullscreen"
}

The start_url above and my Service Worker registration scope as follows: -

navigator.serviceWorker.register('echo.js', { scope: './' })

These settings were the only combo to work on both the case-sensitive GitHub pages and IIS.

IIS Physical path "C:\repos" with a "Brotkrumen" sub-folder.

In both environments all code and Service Workers function as expected. Except for Windows\Chrome\lighthouse spotting the PWA.

Case sensitive Windows???