[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
- Install Claude Desktop on Windows 11 (Build 26200) in Israel
- Open Claude Desktop
- Click on Cowork tab
- 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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