[BUG] [BUG] Cowork - objects.anthropic.com returns NXDOMAIN from Israel (DNS resolution fails globally)

Resolved 💬 2 comments Opened Mar 20, 2026 by MichaelAharon Closed Apr 17, 2026

Preflight Checklist

  • [x] I have searched existing issues and this hasn't been reported yet
  • [x] This is a single bug report (please file separate reports for different bugs)
  • [x] I am using the latest version of Claude Code

What's Wrong?

OS: Windows 11 (Build 26200)
Claude Desktop version: [check Help > About]
Location: Israel

Problem:
Cowork fails with "VM service not running".
The root cause is that objects.anthropic.com cannot be resolved.

Diagnostics:

  • nslookup objects.anthropic.com 1.1.1.1 → Non-existent domain
  • nslookup objects.anthropic.com 8.8.8.8 → Non-existent domain
  • claude.ai works perfectly in browser
  • api.anthropic.com resolves fine
  • Tried DNS: router (192.168.1.1), Google (8.8.8.8), Cloudflare (1.1.1.1) — all fail

Log message:
rootfs.vhdx not found, download fails because objects.anthropic.com cannot be resolved

Labels to add: bug, area:cowork, platform:windows

What Should Happen?

Cowork should successfully resolve objects.anthropic.com and download
the required VM files (rootfs.vhdx), allowing the workspace to start normally.

Error Messages/Logs

Steps to Reproduce

  1. Install Claude Desktop on Windows 11 (Build 26200) in Israel
  2. Open Claude Desktop
  3. Click on Cowork tab
  4. See error: "Failed to start Claude's workspace — VM service not running"

Root cause found via logs:

  • objects.anthropic.com returns NXDOMAIN (non-existent domain)
  • Tested with DNS: 1.1.1.1 (Cloudflare) and 8.8.8.8 (Google) — both fail
  • nslookup objects.anthropic.com 1.1.1.1 → "Non-existent domain"
  • claude.ai and api.anthropic.com work fine
  • Log shows: "rootfs.vhdx not found" — download cannot complete

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

claude --version

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_

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