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Fix Nginx 502 Bad Gateway: Upstream Connection Refused - Fix Nginx Configuration Test Failure After Adding Proxy Pass-Resolve Python UnicodeDecodeError for UTF-16 Files

Updated 2026-07-28 07:30:20browser-issues
Fix Nginx 502 Bad Gateway: Upstream Connection Refused - Fix Nginx Configuration Test Failure After Adding Proxy Pass-Resolve Python UnicodeDecodeError for UTF-16 Files
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.