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Fix npm run build Exit Code 1: Common Causes and Solutions - How to Fix Nginx 502 Upstream Connection Refused-Windows 10 npm ENOENT package.json Missing Error Guide

Updated 2026-07-28 10:54:10windows-fixes
Fix npm run build Exit Code 1: Common Causes and Solutions - How to Fix Nginx 502 Upstream Connection Refused-Windows 10 npm ENOENT package.json Missing Error Guide
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.