I am installing a new Symfony 7.1 / PHP 8.3.8 app with asset mapper and stimulus bundle and I am encountering issues with making stimulus functional :

• symfony new my_project_directory --version="7.1.*" --webapp

• check for the /config/routes/attributes.yaml file, otherwise create it as specified here https://symfony.com/doc/current/routing.html#creating-routes-as-attributes

• create a base controller to render a basic twig file

• add <div data-controller="hello"></div>in the rendered twig file.

When I load the page I have an error in the console Uncaught TypeError: The specifier “@hotwired/stimulus” was a bare specifier, but was not remapped to anything. Relative module specifiers must start with “./”, “../” or “/”.

boostrap.js file looks like this :

import { startStimulusApp } from '@symfony/stimulus-bundle';

const app = startStimulusApp();

hello_controller.js

import { Controller } from '@hotwired/stimulus';
export default class extends Controller {
    connect() {
        this.element.textContent = 'Hello Stimulus! Edit me in assets/controllers/hello_controller.js';
    }
}

and importmap.php

<?php
return [
    'app' => [
        'path' => './assets/app.js',
        'entrypoint' => true,
    ],
    '@symfony/stimulus-bundle' => [
        'path' => './vendor/symfony/stimulus-bundle/assets/dist/loader.js',
    ],
];

This issue is documented here : https://symfony.com/doc/current/frontend/asset_mapper.html#issues-and-debugging

But the provided solutions

php bin/console importmap:require @symfony/stimulus-bundle

or

php bin/console importmap:require @hotwired/stimulus

did not work for me as it returned

[OK] 0 new items () added to the importmap.php

and I still have the same error even after a php bin/console cache:clear

I have also noticed that the generated importmap was slightly different than the documentation here so I tried to change

'@symfony/stimulus-bundle' => [
    'path' => './vendor/symfony/stimulus-bundle/assets/dist/loader.js',
],

to

'@symfony/stimulus-bundle' => [
    'path' => '@symfony/stimulus-bundle/loader.js',
],

But still no success

Am I missing a step ? I could use webpack but the server that we are going to use for deployment does not provide node/npm.

Thanks in advance for any tips