"Error: spawn cmd ENOENT" In Expo Init Project

Question

I am starting a new React-Native Project using

expo init firstexpo

But I get this error at Command Prompt

Error: spawn cmd ENOENT

PS C:\Users\Alex\testing\firstexpo> expo start
[16:21:09] Starting project at C:\Users\Alex\testing\firstexpo
[16:21:11] Expo DevTools is running at http://localhost:19002
[16:21:11] Opening DevTools in the browser... (press shift-d to disable)
Error: spawn cmd ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:232:19)
    at onErrorNT (internal/child_process.js:407:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
PS C:\Users\Alex\testing\firstexpo>

npm start error Cannot find module 'opn'

[16:38:49] Starting project at C:\Users\Alex\testing\firstexpo
[16:38:52] Expo DevTools is running at http://localhost:19002
[16:38:52] Opening DevTools in the browser... (press shift-d to disable)
[16:38:52] Cannot find module 'opn'
[16:38:52] Set EXPO_DEBUG=true in your env to view the stack trace.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! empty-project-template@ start: `expo start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the empty-project-template@ start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Alex\AppData\Roaming\npm-cache\_logs\2018-11-24T08_38_52_344Z-debug.log

I am very new to coding, can anyone tell me how can I solve the problem? Thank you very much.

Downgrade to v28

Answer 1

1- First you need to edit system environment variable and locate where you have Windows Poweshell so add new in "system environment variable path"

2- Then Open Window PoweShell as An Administraror And Write these Two Commands :

:) Upgrade Window PowerShell because your nodejs and npm is updated but powershell is not updated so its making conflict with your npm start or expo start,so you should need to upgrade windows powershell

And Then run Cmd and also run your poject npm start or expo start so quickly it will work!

BEST OF LUCK!

Answer 2

I solved my error using this. "%SystemRoot%\system32;" in the PATH variable.

Answer 3

I got this error everytime I tried to open my app in Expo Go. I did clean all the Expo Go app data in my cell phone and my app run again.