Angular - Prerender command fails and errors

Question

I have an angular application setup, nigh on empty. Just recreating a home page example to test general speed in angular.

I have followed the official docs on simply enabling prerendering.

https://angular.io/guide/universal

BUT, when I run the command npm run prerender (ng run RegTransfersUI:prerender)

I get:

    Prerendering 1 route(s) to D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\browser...ERROR NetworkError
    at XMLHttpRequest3.send (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1518293)
    at Observable2._subscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:2901957)
    at Observable2._trySubscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201465)
    at D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201357
    at Object.errorContext (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1407544)
    at Observable2.subscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201183)
    at scheduleTask (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:3436471)
    at Observable2._subscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:3437074)
    at Observable2._trySubscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201465)
    at D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201357
ERROR NetworkError
    at XMLHttpRequest3.send (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1518293)
    at Observable2._subscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:2901957)
    at Observable2._trySubscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201465)
    at D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201357
    at Object.errorContext (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1407544)
    at Observable2.subscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201183)
    at scheduleTask (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:3436471)
    at Observable2._subscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:3437074)
    at Observable2._trySubscribe (D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201465)
    at D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\server\main.js:1:1201357
√ Prerendering routes to D:\git\Regtransfers-Core-Ang\dist\RegTransfersUI\browser complete.
- Generating service worker...1 rules skipped due to selector errors:
  legend+* -> Cannot read properties of undefined (reading 'type')
× Service worker generation failed.
EPERM: operation not permitted, opendir 'D:\System Volume Information'

I cant find anything on this.