I have a problem in preparing a simple module that displays the word TEST both in the admin panel and on the user’s side after accessing his account

Module structure:
[1]: https://i.sstatic.net/XZeHl4cg.png

controllers/admin/AdminTestController.php

<?php

class AdminTestController extends ModuleAdminController
{
    public function __construct()
    {
        parent::__construct();
    }

    public function initContent()
    {
        parent::initContent();
        $this->setTemplate('test.tpl');
    }
}

controllers/front/TestController.php

<?php

use PrestaShopPrestaShopCoreModuleWidgetInterface;

class TestModuleTestModuleTestController extends ModuleFrontController
{
    public function initContent()
    {
        parent::initContent();

        $this->context->smarty->assign([
            'message' => 'TEST'
        ]);

        $this->setTemplate('module:testmodule/views/templates/front/test.tpl');
    }
}

views/template/admin/test.tpl

<h1>TEST</h1>

views/template/front/test.tpl

<!-- modules/testmodule/views/templates/front/test.tpl -->
<div>
    <a href="{$link->getModuleLink('testmodule', 'test')}">SEE DATA</a>
</div>

/testmodule.php

<?php

if (!defined('_PS_VERSION_')) {
    exit;
}

class TestModule extends Module
{
    public function __construct()
    {
        $this->name = 'testmodule';
        $this->tab = 'front_office_features';
        $this->version = '1.0.0';
        $this->author = 'Your Name';
        $this->need_instance = 0;
        $this->bootstrap = true;

        parent::__construct();

        $this->displayName = $this->l('Test Module');
        $this->description = $this->l('A simple module to display TEST on both admin and user pages.');

        $this->ps_versions_compliancy = array('min' => '1.7', 'max' => _PS_VERSION_);
    }

    public function install()
    {
        return parent::install() &&
            $this->registerHook('displayCustomerAccount') &&
            $this->registerHook('displayAdminProductsMainStepLeftColumnMiddle');
    }

    public function hookDisplayCustomerAccount($params)
    {
        $link = $this->context->link->getModuleLink('testmodule', 'test');
        return '<a href="' . $link . '">SEE DATA</a>';
    }
}

The problem is that the link from /front/test.tpl redirects to localhost:8080/en/module/testmodule/test.

I’ll just add that I’ve been using the Prestashop documentation for the most part and yet these errors appear

Another thing is that on the admin side there is no redirect to this view, on other attempts there was an error status 500 and a store operation error, and the link itself led to the same as above only that for admin

The module itself installed without problems, it appears in the /modules tab

Have any of you encountered something like this?

Environment: Docker - windows 10
Prestashop: 8.1