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How to Fix Nginx Upstream Connection Refused on Port 80 - Windows Security App Not Opening Command Prompt Fix-npm ERR! enoent package.json: Causes and Fixes

2026-07-28 12:54:32
How to Fix Nginx Upstream Connection Refused on Port 80 - Windows Security App Not Opening Command Prompt Fix-npm ERR! enoent package.json: Causes and Fixes

Result check

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