framework:
    error_controller: App\Controller\ErrorController::show

<?php

declare(strict_types=1);
namespace App\Controller;

use Ibexa\Contracts\Core\Repository\LocationService;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;

class ErrorController extends AbstractController
{
    public function show(LocationService $locationService): Response
    {
        $location = $locationService->loadLocation(2);
        return $this->render('@ibexadesign/errors/error.html.twig',
            [
                'location' => $location
            ]
        );
    }
}

{{ ibexa_render_field(location.getContent(), 'page') }}

Call to a member function getUser() on null

  at /var/www/html/vendor/ibexa/page-builder/src/lib/HTTP/Kernel/Fragment/DecoratedFragmentRenderer.php:197
  at Ibexa\PageBuilder\HTTP\Kernel\Fragment\DecoratedFragmentRenderer->decorateWithEditorialModeBearer(object(ControllerReference))
     (/var/www/html/vendor/ibexa/page-builder/src/lib/HTTP/Kernel/Fragment/DecoratedFragmentRenderer.php:123)
  at Ibexa\PageBuilder\HTTP\Kernel\Fragment\DecoratedFragmentRenderer->render(object(ControllerReference), object(Request), array('ignore_errors' => false))
     (/var/www/html/vendor/symfony/http-kernel/Fragment/FragmentHandler.php:85)
  at Symfony\Component\HttpKernel\Fragment\FragmentHandler->render(object(ControllerReference), 'esi', array('ignore_errors' => false))
     (/var/www/html/vendor/symfony/http-kernel/DependencyInjection/LazyLoadingFragmentHandler.php:49)
  at Symfony\Component\HttpKernel\DependencyInjection\LazyLoadingFragmentHandler->render(object(ControllerReference), 'esi', array())
     (/var/www/html/vendor/symfony/twig-bridge/Extension/HttpKernelRuntime.php:58)
  at Symfony\Bridge\Twig\Extension\HttpKernelRuntime->renderFragmentStrategy('esi', object(ControllerReference))
     (/var/www/html/var/cache/dev/twig/3c/3c792df7044c156459288e3c32a1b578.php:74)