I am working on a project where I use nodemon. Few days ago I installed and started nodemon. It was working but two hours later I had this error:

Error: Cannot find module 'node-sessionstorage'
Require stack:
- C:\Users\PC\Desktop\Ramses\Ramses\index.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:902:15)
    at Function.Module._load (internal/modules/cjs/loader.js:746:27)        
    at Module.require (internal/modules/cjs/loader.js:974:19)
    at require (internal/modules/cjs/helpers.js:93:18)
    at Object.<anonymous> (C:\Users\PC\Desktop\Ramses\Ramses\index.js:35:17)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    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:790:12)        
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:76:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ 'C:\\Users\\PC\\Desktop\\Ramses\\Ramses\\index.js' ]      
}
[nodemon] app crashed - waiting for file changes before starting...

After that I have not been able to make it work. What can I do? This is my package json:

{
    "name": "ramses",
    "version": "1.0.0",
    "description": "Entorno de simulación...",
    "main": "index.js",
    "scripts": {
        "start": "nodemon index.js"
    },
    "author": "PC",
    "dependencies": {
        "dom-to-image": "^2.6.0",
        "express": "^4.17.3",
        "express-load": "^1.1.16",
        "express-session": "^1.17.2",
        "html2canvas": "^1.4.1",
        "mysql": "^2.18.1",
        "nodemon": "^2.0.15"
    }
}

And in my index.js I put this line to make nodemon work

const storage = require('node-sessionstorage');