Unable to run npm start - json

Question

So I am following an online course and I am stuck. I am running the command npm run start in cmd and it seems not to be working.
Here is the webpack.config.js file:
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Here is the package.json file:
enter image description here
Here is the error code I get from cmd:
C:\Users\user\Desktop\complete-javascript-course-master\9-forkify\starter>npm run start
> forkify#1.0.0 start C:\Users\user\Desktop\complete-javascript-course-master\9-forkify\starter
> webpack-dev-server --mode development --open
internal/modules/cjs/loader.js:985
throw err;
^
Error: Cannot find module 'webpack-cli/bin/config-yargs'
Require stack:
- C:\Users\user\Desktop\complete-javascript-course-master\9-forkify\starter\node_modules\webpack-dev-server\bin\webpack-dev-server.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:982:15)
at Function.Module._load (internal/modules/cjs/loader.js:864:27)
at Module.require (internal/modules/cjs/loader.js:1044:19)
at require (internal/modules/cjs/helpers.js:77:18)
at Object.<anonymous> (C:\Users\user\Desktop\complete-javascript-course-master\9-forkify\starter\node_modules\webpack-dev-server\bin\webpack-dev-server.js:65:1)
at Module._compile (internal/modules/cjs/loader.js:1158:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
at Module.load (internal/modules/cjs/loader.js:1002:32)
at Function.Module._load (internal/modules/cjs/loader.js:901:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12) {
code: 'MODULE_NOT_FOUND',
requireStack: [
'C:\\Users\\user\\Desktop\\complete-javascript-course-master\\9-forkify\\starter\\node_modules\\webpack-dev-server\\bin\\webpack-dev-server.js'
]
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! forkify#1.0.0 start: `webpack-dev-server --mode development --open`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the forkify#1.0.0 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\user\AppData\Roaming\npm-cache\_logs\2020-05-04T10_43_57_046Z-debug.log
C:\Users\user\Desktop\complete-javascript-course-master\9-forkify\starter>
What could be possibly wrong please?