mongodb-memory-server failing to start

When trying to start MongoMemoryServer i get this:

 RUNS  test/user.test.js

    Starting the instance failed, please enable debug for more infomation

      at node_modules/mongodb-memory-server-core/src/MongoMemoryServer.ts:111:19

  console.log
    Mongod instance closed with code "100"

I am trying to use a memory server for integration testing. This is my code:

import supertest from 'supertest';
import mongoose from 'mongoose';
import validator from 'validator';
import { MongoMemoryServer } from 'mongodb-memory-server';
import { app } from '../src/app.js';

jest.setTimeout(600000);

let mockServer;

beforeAll(async () => {
  // mockServer = new MongoMemoryServer();
  mockServer = await MongoMemoryServer.create({
    autoStart: true,
    debug: true,
    binary: { version: 'latest' },
  });

  const uri = await mockServer.getUri();

  const opts = {
    useNewUrlParser: true,
    useCreateIndex: true,
    useUnifiedTopology: true,
  };

  await mongoose.connect(uri, opts, (err) => {
    if (err) console.log(err);
  });
});

afterAll(async (done) => {
  mongoose.disconnect(done);
  await mockServer.stop();
});

afterEach(async () => {
  const collections = await mongoose.connection.db.collections();

  for (const collection of collections) {
    await collection.deleteMany();
  }
});

Its seems like the initial setup of the memory server is not working at all..

I cant find an answer to this problem anywhere, and I have tried every setup of the server i could find. Thanks in advance.