CI4 beta.1 - How to load view in view with layout

Hello,

In beta 1, how can I load a partial view in a view with layout?

When I use this code, nothing is rendered. 

PHP Code:

<?= $this->extend('layout') ?>

<?= $this->section('content') ?>
    <?= view('partial'); ?>
    <h1>Hello World!</h1>
<?= $this->endSection() ?>

But without layout, it will work.

PHP Code:

<?= view('partial'); ?>
<h1>Hello World!</h1> 


His error report seems to be similar to that found by me:
https://forum.codeigniter.com/thread-72967.html