Nginx 502 Bad Gateway: PHP-FPM Fix Guide - Fix Windows Defender & Ubuntu Sync Issues on Dual Boot-Windows 10 Error 0xc004f074: Simple Fixes

Updated 2026-06-13 14:53:09backup-recovery
Nginx 502 Bad Gateway: PHP-FPM Fix Guide - Fix Windows Defender & Ubuntu Sync Issues on Dual Boot-Windows 10 Error 0xc004f074: Simple Fixes
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.