Express-getting this error message trying to run server - node.js

Question

I'm trying to run the server on the back-end of a project I'm doing and I keep getting this error message and it stops the server from running. I installed express generator if that makes any difference
> server#0.0.0 start /Users/username/Desktop/project/server
> node ./bin/www
internal/modules/cjs/loader.js:905
throw err;
^
Error: Cannot find module 'http-errors'
Require stack:
- /Users/username/Desktop/project/server/main/app.js
- /Users/username/Desktop/project/server/bin/www
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:902:15)
at Function.Module._load (internal/modules/cjs/loader.js:747:27)
at Module.require (internal/modules/cjs/loader.js:974:19)
at require (internal/modules/cjs/helpers.js:88:18)
at Object.<anonymous> (/Users/username/Desktop/project/server/main/app.js:1:19)
at Module._compile (internal/modules/cjs/loader.js:1085:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
at Module.load (internal/modules/cjs/loader.js:950:32)
at Function.Module._load (internal/modules/cjs/loader.js:791:14)
at Module.require (internal/modules/cjs/loader.js:974:19) {
code: 'MODULE_NOT_FOUND',
requireStack: [
'/Users/username/Desktop/project/server/main/app.js',
'/Users/username/Desktop/project/server/bin/www'
]
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! server#0.0.0 start: `node ./bin/www`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the server#0.0.0 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! /Users/username/.npm/_logs/2020-11-13T03_27_43_635Z-debug.log

Answer 1

It clearly says Error: Cannot find module 'http-errors', so you probably don't have the package installed locally. Run npm i http-errors to download it.
Alternatively, if you'd like to save the package as a dependency in your project, run npm i http-errors --save