I Can't generate a PDF in Dompdf due to error 500

Question

I need to generate a pdf file, and I've tried this code in my localhost xampp and it doesn't give me any problem

<?php
ob_start();
echo "hola mundo";
    $html=ob_get_clean();
    //echo $html;
    
    require_once("../../librerias/dompdf/autoload.inc.php");
// reference the Dompdf namespace
use Dompdf\Dompdf;

// instantiate and use the dompdf class
$dompdf = new Dompdf();
$options=$dompdf->getOptions();
$options->set(array('isRemoteEnabled'=>true));
$dompdf->setOptions($options);
$dompdf->loadHtml($html);

// (Optional) Setup the paper size and orientation
$dompdf->setPaper('letter', 'portrait');

// Render the HTML as PDF
$dompdf->render();

// Output the generated PDF to Browser
$dompdf->stream("nota_de_venta_.pdf",array("Attachment"=>false));


?>   

but when I take it to my web server it gives me an HTTP ERROR 500. The same exact code. I realized that the line where the error begins is at.

$dompdf = new Dompdf();

Does anybody know why it could be? I don't have an exclusive web server so I thing I probably won't have access to advance file configurations.

Thanks a lot for your answers.