Why does "npm start" give me error when i try run my app? - node.js

Question

i dont understand why i got this error every
time when i try run "npm start".
> # start E:\ReactNative\navigation_app
> expo start
internal/modules/cjs/loader.js:895
throw err;
^
Error: Cannot find module 'C:\Users\Roei\AppData\Roaming\npm\node_modules\expo-cli\bin\expo.js'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:892:15)
at Function.Module._load (internal/modules/cjs/loader.js:785:27)
at Function.Module.runMain (internal/modules/cjs/loader.js:1143:12)
at internal/main/run_main_module.js:16:11 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! # start: `expo start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the # 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\Roei\AppData\Roaming\npm-cache\_logs\2019-11-16T17_19_40_408Z-debug.log
this is my package.json and try
to figure out whats wrong there
{
"main": "node_modules/expo/AppEntry.js",
"scripts": {
"start": "expo start",
"android": "expo start --android",
"ios": "expo start --ios",
"web": "expo start --web",
"eject": "expo eject"
},
"dependencies": {
"expo": "^35.0.0",
"expo-font": "^7.0.0",
"react": "16.8.3",
"react-dom": "16.8.3",
"react-native": "https://github.com/expo/react-native/archive/sdk-35.0.0.tar.gz",
"react-native-web": "^0.11.7"
},
"devDependencies": {
"babel-preset-expo": "^7.1.0"
},
"private": true
}
i would like to solve that issue and to understand whats worng .

Answer 1

You need to install expo-cli globally npm i -g expo-cli

Answer 2

you need to install Expo. Run an npm install or install expo globally

Answer 3

You don't have Expo-CLI installed globally, that is why you are getting the error at your local project. It needs Expo module to work, but can't find it. So run npm install -g expo-cli as it has been said, if it does not install paste the error code here.