Hi m n,
Thank you for reaching out to Microsoft Q & A forum.
It appears that the issue may be related to your local network or DNS settings, especially since others can access the libraries without any problems.
Here are a few steps you can try:
1.Visit https://unpkg.com in your browser to check if the site is reachable.
2.Consider switching to a public DNS service like Google (8.8.8.8) or Cloudflare (1.1.1.1) to rule out DNS issues.
3.If you're on a corporate or restricted network, check if a firewall or proxy might be blocking access.
4.As an alternative, you can use another CDN such as jsDelivr: https://cdn.jsdelivr.net/npm/@microsoft/signalr@latest/dist/browser/signalr.js
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