Module is extraneous npm - npm

Question

I've checked that the connect-privkey-to-provider module is in the dependencies. However, it keeps saying Module 'connect-privkey-to-provider' is extraneous npm and cannot find module 'connect-privkey-to-provider'.
What's wrong with my code?
PS C:\Users\1Sun\addition-game-starter> truffle deploy --network
klaytn
Error: Cannot find module 'connect-privkey-to-provider'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:582:15)
at Function.Module._load (internal/modules/cjs/loader.js:508:25)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
at Object. (C:\Users\1Sun\addition-game-starter\truffle.js:2:29)
at Module._compile (internal/modules/cjs/loader.js:701:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)
at Module.load (internal/modules/cjs/loader.js:600:32)
at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
at Function.Module._load (internal/modules/cjs/loader.js:531:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
at Function.Config.load (C:\Users\1Sun\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\truffle-config\index.js:254:1)
at Function.Config.detect (C:\Users\1Sun\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\truffle-config\index.js:243:1)
at Object.run (C:\Users\1Sun\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\truffle-core\lib\commands\migrate.js:35:1)
at Command.run (C:\Users\1Sun\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\truffle-core\lib\command.js:101:1)
at Object. (C:\Users\1Sun\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\truffle-core\cli.js:22:1)
at webpack_require (C:\Users\1Sun\AppData\Roaming\npm\node_modules\truffle\build\webpack:\webpack\bootstrap
0791995565e53f633c90:19:1)
at C:\Users\1Sun\AppData\Roaming\npm\node_modules\truffle\build\webpack:\webpack\bootstrap
0791995565e53f633c90:65:1
at Object. (C:\Users\1Sun\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js:71:10)
at Module._compile (internal/modules/cjs/loader.js:701:30)
package.json
{
"name": "klay-dapp-boilerplate",
"version": "0.0.1",
"description": "boilerplate for klaytn-based app",
"main": "truffle.js",
"scripts": {
"build": "webpack",
"dev": "webpack-dev-server"
},
"dependencies": {
"caver-js": "^0.0.2-m",
"connect-privkey-to-provider": "^0.0.3",
"spin.js": "^4.0.0"
},
"devDependencies": {
"copy-webpack-plugin": "^4.6.0",
"eslint": "^4.19.1",
"webpack": "^4.7.0",
"webpack-cli": "^3.1.1",
"webpack-dev-server": "^3.1.4"
},
"eslintConfig": {
"env": {
"browser": true,
"node": true
}
}
}
truffle.js
// truffle.js config for klaytn.
const PrivateKeyConnector = require('connect-privkey-to-provider')
const NETWORK_ID = '1001'
const GASLIMIT = '20000000'
const URL ='https://api.baobab.klaytn.net:8651'
const PRIVATE_KEY = '0x80ea7e298ba2cbf484e6c0c0703ccf2ea94be7f8a1a097fc013042b4888a2e80'
module.exports = {
networks: {
klaytn: {
provider: new PrivateKeyConnector(PRIVATE_KEY, URL),
network_id: NETWORK_ID,
gas: GASLIMIT,
gasPrice: null,
}
}
}
Error

Answer 1

Your code works fine in my environment. Try to do these:
Remove node_modules
Remove package-lock.json
Update truffle package npm update -g truffle
Reinstall, using command npm i
After that just change solidity version in contracts folder
pragma solidity ^0.5.0;

Answer 2

In my case for changing some dependencies, I was deleting node_modules, but I had to erase package-lock.json too.
I closed all windows, deleted node_modules folder and package-lock.json and reinstalled it all again with npm install.