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Home / macos-help / How to Fix Git Detached HEAD State and Undo Changes - Troubleshoot Cloudflare 521 and Proxy Issues-Windows 11 Upgrade Hangs at 99%: Troubleshooting Guide

How to Fix Git Detached HEAD State and Undo Changes - Troubleshoot Cloudflare 521 and Proxy Issues-Windows 11 Upgrade Hangs at 99%: Troubleshooting Guide

Updated 2026-07-28 13:07:17macos-help
How to Fix Git Detached HEAD State and Undo Changes - Troubleshoot Cloudflare 521 and Proxy Issues-Windows 11 Upgrade Hangs at 99%: Troubleshooting Guide
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.