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Fix Nginx 502 Bad Gateway: Upstream Connection Refused - How to Fix Chrome Profile Sync After Update-Nginx Upstream Directive Test Failure Fix

2026-07-29 00:27:38office-tools
Fix Nginx 502 Bad Gateway: Upstream Connection Refused - How to Fix Chrome Profile Sync After Update-Nginx Upstream Directive Test Failure Fix

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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