I get a PEAR error trying to do a require_once (XAMPP)

I'm a student kind of new in programming. I was doing college homework with PHP, and got these errors trying to include a controller:

Warning: require_once(../models/teams.model.php): Failed to open stream: No such file or directory in F:\xampp\htdocs\FACULTAD\FORMULA 1 - TPE\app\controllers\teams.controller.php on line 3

Fatal error: Uncaught Error: Failed opening required '../models/teams.model.php' (include_path='F:\xampp\php\pear\PEAR') in F:\xampp\htdocs\FACULTAD\FORMULA 1 - TPE\app\controllers\teams.controller.php:3 Stack trace: #0 F:\xampp\htdocs\FACULTAD\FORMULA 1 - TPE\router.php(15): require_once() #1 {main} thrown in F:\xampp\htdocs\FACULTAD\FORMULA 1 - TPE\app\controllers\teams.controller.php on line 3

(I thinnk some errors are not PEAR related)

I already tried some solutions from different forums, but nothing worked. Tried uninstalling XAMPP and reinstalling a new version, modified the php.ini file with the right path, tried something with a go-pear.php...

I don't know much about these things, so I don't want to modify files without knowing what I'm doing.

Here's the code. It is incomplete and has errors because I focused on solving the PEAR thing, rather than finish coding the router, controllers, etc.

<?php //ROUTER...
define('BASE_URL', '//'.$_SERVER['SERVER_NAME'] . ':' . $_SERVER['SERVER_PORT'] dirname($_SERVER['PHP_SELF']).'/');

require_once 'app/controllers/teams.controller.php';
require_once 'app/controllers/index.controller.php';

$action = 'home';

if (!empty($_GET['action'])) {
    $action = $_GET['action'];
}

$params = explode('/', $action);

switch ($params[0]) {
    case 'home':
        $indexController->home();
        break;
    case 'teams':
        $teamID = null;
        if (isset($params[1])) $teamID = $params[1];
        $teamsController->getTeams($teamID);
        break;
    default:
        echo('404 Page not found ;)');
        break;
}






<?php //CONTROLLER...

require_once '../models/teams.model.php';
require_once '../views/teams.view.php';

class teamsController {

    private $model;

    private $view;

    public function __construct() {

        $this->model = new teamsModel;
        $this->view = new teamsView;

    }

    function getTeams($teamID) {
        
        if ($teamID == null) { //SI ES NULO, MUESTRA TODAS LAS ESCUDERÍAS
            $allTeams = $this->model->getAllTeams(); //PIDE TODAS LAS ESCUDERÍAS AL MODEL
            $this->model->showAllTeams($allTeams); //MANDA LOS DATOS AL VIEW
        }
        else {
            $teamData = $this->model->getSelectedTeam($teamID); //PIDE LA ESCUDERÍA SELECCIONADA AL MODEL
            $this->view->showSelectedTeam($teamData); //MANDA LOS DATOS AL VIEW
        }

    }

}

If anyone could help me with this, it would be awesome. I need to fix this as soon as possible.