stripHtml filter doesn't work

I just downloaded the https://github.com/…reloaded.zip web project
and the stripHtml https://latte.nette.org/en/filters#… latte filter doesn't work on localhost or my hosting

I'm not sure if it's a bug but I think you can answer that :)

/vendor/tracy/tracy/src/Bridges/Nette/Bridge.php(73): is_file(NULL)

<?php

declare(strict_types=1);

namespace App\Presenters;

use Nette;


final class HomepagePresenter extends Nette\Application\UI\Presenter
{
	public function renderDefault(){
		$this->template->html = '<a href="https://nette.org">Nette</a>';
	}
}

default.latte
{$html|stripHtml}