Home / developer-tools / How to Fix Cloudflare Error 521: Origin Server Unreachable - How to Fix 'Refusing to Merge Unrelated Histories' in Git-Error 0x80070080002 Windows Update: Step-by-Step Fix

How to Fix Cloudflare Error 521: Origin Server Unreachable - How to Fix 'Refusing to Merge Unrelated Histories' in Git-Error 0x80070080002 Windows Update: Step-by-Step Fix

Updated 2026-07-28 10:53:48developer-tools

How to Fix Cloudflare Error 521: Origin Server Unreachable - How to Fix 'Refusing to Merge Unrelated Histories' in Git-Error 0x80070080002 Windows Update: Step-by-Step Fix

Prepare

Execute

Validate

Document

Operational follow-up

Record the exact option, command, or setting that changed the result.
Keep a rollback note if the workflow affects shared files or team settings.

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