Fix Nginx 'upstream connection refused' When Talking to PHP-FPM - Windows 11 Update Stuck at 0% in Safe Mode: How to Fix-How to Fix npm Run Build Failed Error

Updated 2026-07-28 05:00:51windows-fixes

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM - Windows 11 Update Stuck at 0% in Safe Mode: How to Fix-How to Fix npm Run Build Failed Error

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.