Fixing Nginx Upstream Connection Refused on Port 443 - Fix Git Stash Error: index.lock File Exists-Fix Git Detached HEAD by Creating a New Branch

Updated 2026-07-28 05:46:59security-tools

Fixing Nginx Upstream Connection Refused on Port 443 - Fix Git Stash Error: index.lock File Exists-Fix Git Detached HEAD by Creating a New Branch

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.