Cannot find module ‘express’ even though ‘express’ is already installed

I ran the command npm start and got the following error.

node:internal/modules/cjs/loader:928
  throw err;
  ^

Error: Cannot find module 'express'
Require stack:
- C:CodecodeFilecode-file-appdistserverserver.js
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:925:15)
    at Function.Module._load (node:internal/modules/cjs/loader:769:27)
    at Module.require (node:internal/modules/cjs/loader:997:19)
    at require (node:internal/modules/cjs/helpers:92:18)
    at Object.<anonymous> (C:CodecodeFilecode-file-appdistserverserver.js:6:35)
    at Module._compile (node:internal/modules/cjs/loader:1108:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)
    at Module.load (node:internal/modules/cjs/loader:973:32)
    at Function.Module._load (node:internal/modules/cjs/loader:813:14)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12) {
  code: 'MODULE_NOT_FOUND',
}
npm ERR! code 1
npm ERR! path C:CodecodeFilecode-file-appserver
npm ERR! command failed
npm ERR! command C:WINDOWSsystem32cmd.exe /d /s /c node ../dist/server/server.js

npm ERR! A complete log of this run can be found in:
npm ERR!     C:Userspatriv5AppDataLocalnpm-cache_logs2023-04-20T15_45_54_540Z-debug.log

I already ran the command npm install express and see express listed in my package.json dependencies and in my node_modules folder yet I am still receiving the error. Has anybody else encountered this issue?