showing error for npm run dev

[yashurade]

PS C:\Users\Acer\newelection\ethereum_voting_dapp-master\chapter2\node_modules\webpack-dev-server> npm run webpack-dev-server

[email protected] webpack-dev-server C:\Users\Acer\newelection\ethereum_voting_dapp-master\chapter2\node_modules\webpack-dev-server
node examples/run-example.js

internal/modules/cjs/loader.js:983
throw err;
^

Error: Cannot find module 'C:\Users\Acer\newelection\ethereum_voting_dapp-master\chapter2\node_modules\webpack-dev-server\examples\run-example.js'
er.js:980:15)
at Function.Module._load (internal/modules/cjs/loader.js:862:27)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
at internal/main/run_main_module.js:18:47 {
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] webpack-dev-server: node examples/run-example.js
npm ERR! Exit status 1
PS C:\Users\Acer\newelection\ethereum_voting_dapp-master\chapter2\node_modules\webpack-dev-server> npm run webpack-dev-server

[email protected] webpack-dev-server C:\Users\Acer\newelection\ethereum_voting_dapp-master\chapter2\node_modules\webpack-dev-server
node examples/run-example.js

internal/modules/cjs/loader.js:983
throw err;
^

Error: Cannot find module 'C:\Users\Acer\newelection\ethereum_voting_dapp-master\chapter2\node_modules\webpack-dev-server\examples\run-example.js'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:980:15)
at Function.Module._load (internal/modules/cjs/loader.js:862:27)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
at internal/main/run_main_module.js:18:47 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] webpack-dev-server: node examples/run-example.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] webpack-dev-server 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\Acer\AppData\Roaming\npm-cache_logs\2020-04-25T21_56_53_268Z-debug.log

i am not able to run npm run dev getting the above error

[MrAnayDongre]

Check the package.json file and check it it contains webpack-dev-server.
If it doesn't you can install it by using the command npm install webpack-dev-server --save-dev .
For further details check the following page