Why can't I find the 'qrcode' module in my new project?

In the same tutorial, I’ve followed all the steps and when I start the server, I’m getting the following error:

TypeError: Cannot read properties of undefined (reading 'findMany')
    at Module.getQRCodes (C:\Users\Hp\Test\picking-pro-embedded-v1\app\models\QRCode.server.js:16:35)
    at loader (C:\Users\Hp\Test\picking-pro-embedded-v1\app\routes\app._index.jsx:21:25)
    at async Object.callRouteLoader (C:\Users\Hp\Test\picking-pro-embedded-v1\node_modules\@remix-run\server-runtime\dist\data.js:59:16)
    at async C:\Users\Hp\Test\picking-pro-embedded-v1\node_modules\@remix-run\router\dist\router.cjs.js:4683:21
    at async callLoaderOrAction (C:\Users\Hp\Test\picking-pro-embedded-v1\node_modules\@remix-run\router\dist\router.cjs.js:4748:16)
    at async Promise.all (index 2)
    at async callDataStrategyImpl (C:\Users\Hp\Test\picking-pro-embedded-v1\node_modules\@remix-run\router\dist\router.cjs.js:4623:17)
    at async callDataStrategy (C:\Users\Hp\Test\picking-pro-embedded-v1\node_modules\@remix-run\router\dist\router.cjs.js:4111:19)
    at async loadRouteData (C:\Users\Hp\Test\picking-pro-embedded-v1\node_modules\@remix-run\router\dist\router.cjs.js:4086:19)
    at async queryImpl (C:\Users\Hp\Test\picking-pro-embedded-v1\node_modules\@remix-run\router\dist\router.cjs.js:3931:20)

Can anyone assist with this please?

Thanks

Naz