How to Fix Cloudflare 521 Error Due to Proxy Issues - How to Resolve 'Git Remote Origin Already Exists' in VS Code-React App Build Fails with Out of Memory Error – Fix

Updated 2026-07-28 13:44:11macos-help

How to Fix Cloudflare 521 Error Due to Proxy Issues - How to Resolve 'Git Remote Origin Already Exists' in VS Code-React App Build Fails with Out of Memory Error – Fix

Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

Restart the affected app after changing permissions or configuration files.
Test the same workflow in a clean browser profile or a temporary user account.
Compare the result on another network if the error may be connection related.