NGRX selector : x is not a function

Question

I'm curious to know why this raises a typerror is there something I'm missing?

 export const selectAllUsers = createFeatureSelector<ReadonlyArray<User>>('users');

 export const selectUser = () =>
  createSelector(selectAllUsers, (users) => {
    return users.find(
      (user) =>
        user.name === "Mr.Doe"
    )});

Which is very similar to the Book example in the ngrx walktrhough will raise this error in the browser console :

 ERROR TypeError: users.find is not a function
    selectUser user.selector.ts:13
    memoizedProjector ngrx-store.mjs:697

I will be able to get my user using the selectUser but that boggles me to see this error, I feel like I'm missing something important in typescript or in store selectors

Tested on firefox and chrome, both under linux

package.json

   "@angular/animations": "~13.1.2",
    "@angular/cdk": "^13.1.2",
    "@angular/common": "~13.1.2",
    "@angular/compiler": "~13.1.2",
    "@angular/core": "~13.1.2",
    "@angular/forms": "~13.1.2",
    "@angular/material": "^13.1.2",
    "@angular/platform-browser": "~13.1.2",
    "@angular/platform-browser-dynamic": "~13.1.2",
    "@angular/router": "~13.1.2",
    "@ngrx/store": "^13.0.2",
    "@ngrx/store-devtools": "^13.0.2",
    "rxjs": "~6.6.0",
    "tslib": "^2.0.0",
    "zone.js": "~0.11.4"`

Edit 1: ERROR TypeError: user.find -> users.find
Edit 2: Nothing but users(players) in the user state, here is a screen taken from devtools, the names are different, hence the typo above

Answer 1

@Osakr, @mak15 and @MarteenDev were on the right path : the user state wasn't a pure array of players

Angular NGRX getting error when dispatching to state

I left a reducer that was polluting the state ( I didn't normalize my state at some point) Don't know why it was working tho, I may have not typed the reducer enough.

This is a first project so I didnt thoroughly did that
https://duncanhunter.gitbook.io/angular-and-ngrx/15.-strongly-type-our-store#2.-add-a-global-state-interface

Anyhow thanks for the help.