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Home / backup-recovery / How to Fix Nginx 502 Bad Gateway in Docker - Fix Nginx 'upstream connection refused' When Talking to PHP-FPM-Windows 11 Installation Assistant Stuck at 99% Due to Antivirus

How to Fix Nginx 502 Bad Gateway in Docker - Fix Nginx 'upstream connection refused' When Talking to PHP-FPM-Windows 11 Installation Assistant Stuck at 99% Due to Antivirus

Updated 2026-07-28 06:47:06backup-recovery
How to Fix Nginx 502 Bad Gateway in Docker - Fix Nginx 'upstream connection refused' When Talking to PHP-FPM-Windows 11 Installation Assistant Stuck at 99% Due to Antivirus
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.

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