Segmentation fault (core dumped) when trying to access my firebase database

[AnabelSalomone]

• Node.js 15.6.0:
• Ubuntu 18.04.5 64-bit:
• Firebase 8.2.4 and Express 4.17.1

I'm trying to use Node (Express) to access my firebase database but every time I try to access I get an error like 1] 22222 segmentation fault (core dumped) node server/app.js or 4302 abort (core dumped) node server/app.js. I can't see what the problem is so I need some enlightenment:

let express = require("express");
let app = express();
var firebase = require("firebase-admin");
require("firebase/database")


const serviceAccount = require("./keys.json");

let config = {
  credential: firebase.credential.cert(serviceAccount),
  databaseURL: "https://<MY_DB>.firebasedatabase.app",
};


firebase.initializeApp(config);

let db = firebase.database();

app.get("/", (req, res) => {
    db.ref().once("value")
    .then(function(snapshot) {
        console.log(snapshot.val())
    })
    res.send("Hello World!");
})

app.listen(5000, function () {
  console.log("Listened on port 5000!");
});

[AnabelSalomone]

This is issue might be related to this: firebase/firebase-admin-node#1042