Errors on 'concurrently "npm run server" "npm run client" with MERN - node.js

Question

First of all, I would like to apologize for the spelling mistakes, I'm not very good.
I have a problem whilethe starting my mern server...
I want to run it with with "npm run dev". This command line execute "npm run server" and "npm run client".
Here's my errors :
C:\Users\Jérémy\Desktop\Rendu\MERN\MERN_d04>npm run dev
mern_d04#1.0.0 dev C:\Users\Jérémy\Desktop\Rendu\MERN\MERN_d04
concurrently "npm run server" "npm run client"
[0] Error occurred when executing command: npm run server
[0] Error: spawn cmd.exe ENOENT
[0] at Process.ChildProcess._handle.onexit (internal/child_process.js:267:19)
[0] at onErrorNT (internal/child_process.js:467:16)
[0] at processTicksAndRejections (internal/process/task_queues.js:84:21)
[1] Error occurred when executing command: npm run client
[1] Error: spawn cmd.exe ENOENT
[1] at Process.ChildProcess._handle.onexit (internal/child_process.js:267:19)
[1] at onErrorNT (internal/child_process.js:467:16)
[1] at processTicksAndRejections (internal/process/task_queues.js:84:21)
[1] npm run client exited with code -4058
[0] npm run server exited with code -4058
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! mern_d04#1.0.0 dev: `concurrently "npm run server" "npm run client"`>npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the mern_d04#1.0.0 dev 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\Jérémy\AppData\Roaming\npm-cache\_logs\2020-04-22T19_45_03_286Z-debug.log
And Here's, my root package.json :
{
"name": "mern_d04",
"version": "1.0.0",
"description": "",
"main": "server.js",
"scripts": {
"client-install": "npm-install --prefix client",
"start": "node server.js",
"server": "nodemon server.js",
"client": "npm start --prefix client",
"dev": "concurrently \"npm run server\" \"npm run client\""
},
"author": "",
"license": "ISC",
"dependencies": {
"bcryptjs": "^2.4.3",
"body-parser": "^1.19.0",
"concurrently": "^5.1.0",
"express": "^4.17.1",
"is-empty": "^1.2.0",
"jsonwebtoken": "^8.5.1",
"mongoose": "^5.9.10",
"passport": "^0.4.1",
"passport-jwt": "^4.0.0",
"validator": "^13.0.0"
},
"devDependencies": {
"nodemon": "^2.0.3"
}
}
And here's my client package.json :
{
"name": "client",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^4.2.4",
"#testing-library/react": "^9.5.0",
"#testing-library/user-event": "^7.2.1",
"axios": "^0.19.2",
"classnames": "^2.2.6",
"jwt-decode": "^2.2.0",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-redux": "^7.2.0",
"react-router-dom": "^5.1.2",
"react-scripts": "3.4.1",
"redux": "^4.0.5",
"redux-thunk": "^2.3.0"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"proxy": "http://localhost:5000",
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
I've tried many things and, the most surprising thing is : it works on the computer of my friend but not mines.
Please someone can help me? :)
EDIT : Node version : 13.0.0
EDIT : Found the solution. I "just" had a variable "C:\Windows\System32" in the environment variables :)

Answer 1

I was facing the same problem.
for this code works, you can try this.. on your root package.json
"scripts": {
"start": "node index",
"server": "nodemon index",
"client": "npm run start --prefix client",
"dev": "concurrently \"npm run server\" \"cd client && npm start\""
},
and then from root directory type npm run dev

Answer 2

The node_modules are not compatible with your current systems. You may remove the node_modules folders at the root level AS WELL AS at the client level. Then you install both node_modules AGAIN.