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Fix Nginx Configuration Test Failed: Duplicate Listen Error - Nginx 502 Upstream Connection Refused Guide-Resolve UnicodeDecodeError in Python ftplib

2026-07-28 09:45:27
Fix Nginx Configuration Test Failed: Duplicate Listen Error - Nginx 502 Upstream Connection Refused Guide-Resolve UnicodeDecodeError in Python ftplib

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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