How to Fix Cloudflare Error 521: Web Server Is Down - How to Fix Git Push Rejected (Non Fast-Forward Error)-Git LFS Push 403 Error Fix

Updated 2026-07-28 09:22:11developer-tools

How to Fix Cloudflare Error 521: Web Server Is Down - How to Fix Git Push Rejected (Non Fast-Forward Error)-Git LFS Push 403 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.