Compatibility problem between mangoose 8.4.4 and Angular 18 SSR (node)

I recently built a project from scratch : Angular 18 app (SSR). The project includes some libraries imported from another more achieve project (copy pasting the package.json).

I set up my application (in server.ts), performing then

ng build 

and finally a

nodemon dist/<projectname>/server/server.mjs 

to rend the app on localhost.My app got crashed every time i tried to render my server.mjs with the following result :

TypeError: Cannot convert undefined or null to object  at Function.getPrototypeOf (<anonymous>)  at file:///C:../server/server.mjs:107:202540  at file:///C:../server/chunk-GUTDEJWW.mjs:2:1056  at ...

I figured out that the problem came from the following line of code :

const mongoose = require('mongoose');

^{Node version : 20.12.2}

^{mongoose version 8.4.4}

I tried to retrograt mongoose to 6.8.4 (as my old project) but the problem persists.

If someone knows why mongoose 8 is not compatible with my Angular 18 or if knows something, i would like to hear it.