npm start throws errors

[4o3Gone]

pm start

TecSpy@1.0.0 start
node index.js

internal/modules/cjs/loader.js:818
throw err;
^

Error: Cannot find module 'express'
Require stack:

• /home/peanuts/GitHub-Hacking-Tools/TecSpy/index.js
  at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)
  at Function.Module._load (internal/modules/cjs/loader.js:667:27)
  at Module.require (internal/modules/cjs/loader.js:887:19)
  at require (internal/modules/cjs/helpers.js:74:18)
  at Object. (/home/peanuts/GitHub-Hacking-Tools/TecSpy/index.js:7:17)
  at Module._compile (internal/modules/cjs/loader.js:999:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
  at Module.load (internal/modules/cjs/loader.js:863:32)
  at Function.Module._load (internal/modules/cjs/loader.js:708:14)
  at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/home/peanuts/GitHub-Hacking-Tools/TecSpy/index.js' ]
  }
  npm ERR! code 1
  npm ERR! path /home/peanuts/GitHub-Hacking-Tools/TecSpy
  npm ERR! command failed
  npm ERR! command sh -c node index.js

npm ERR! A complete log of this run can be found in:
npm ERR! /home/peanuts/.npm/_logs/2022-04-11T17_25_09_936Z-debug.log

copy-pasting the errors I got when starting npm on Parrot OS. If this isn't a bug, please explain me what's wrong.