Running start command indefinitely

[oaustegard]

Describe the bug

Attempting to run the Angular tutorial from https://angular.io/start in Chrome Version 95.0.4638.69
The code compiles successfully but the preview is stuck indefinitely at the "Running start command" level.

The browser console shows the following errors:

Uncaught (in promise) DOMException: Failed to register a ServiceWorker for scope ('https://angular-pyhjsn.stackblitz.io/') with script ('https://angular-pyhjsn.stackblitz.io/_sw_.js'): The user denied permission to use Service Worker.

and

​Fetch API cannot load stackblitz:/node_modules/%40angular/cli/lib/config/schema.json. URL scheme "stackblitz" is not supported.

Link to the blitz that caused the error

https://stackblitz.com/edit/angular-pyhjsn?file=src%2Fapp%2Fproduct-list%2Fproduct-list.component.html

Steps to reproduce

In Chrome

1. Go to https://angular.io/start
2. Follow steps to start/fork StackBlitz tutorial
3. Observe above errors

Expected behavior

Expect to see a preview of the Angular app

Screenshots

No response

Platform

Browser name  = Chrome 
Full version  = 95.0.4638.69
Major version = 95
navigator.appName = Netscape
navigator.userAgent = Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36
performance.memory = {
  "totalJSHeapSize": 101811547,
  "usedJSHeapSize": 91565639,
  "jsHeapSizeLimit": 4294705152
}
Hash = 320dd3b483ec8295ca1e4a3ccd95cf9e5165f9d0

Additional context

No response

[oaustegard]

This was caused by 3rd Party cookies being blocked. Allowing Stackblitz to set 3rd party cookies allowed the Serviceworker to be run and the preview to show. It may be useful to check for that specific condition and provide a meaningful error message in the console? Better yet, find a way to NOT require 3rd party cookies.

[jrvidal]

@oaustegard We're aware of this error being confusing, we're working on it

[oaustegard]

Excellent - appreciate it. FWIW - this is where I found my workaround: https://github.community/t/the-user-denied-permission-to-use-service-worker-when-using-codespaces/195324

[jrvidal]

@oaustegard We now have a friendlier error and some documentation about it 🎉