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Home / macos-help / Nginx Upstream Connection Refused: Fixing localhost Errors - Troubleshooting npm run build: Common Problems and Fixes-VS Code IntelliSense Not Working in Workspace: Fixes

Nginx Upstream Connection Refused: Fixing localhost Errors - Troubleshooting npm run build: Common Problems and Fixes-VS Code IntelliSense Not Working in Workspace: Fixes

Updated 2026-07-28 08:52:56macos-help
Nginx Upstream Connection Refused: Fixing localhost Errors - Troubleshooting npm run build: Common Problems and Fixes-VS Code IntelliSense Not Working in Workspace: Fixes
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.