Going through a new installation, after the Language support list, I get:

<b>Fatal error</b>: Call to undefined method domdocument::loadXML() in <b>C:\xampp\htdocs\ezpublish-4.0.1\kernel\setup\steps\ezstep_site_types.php</b> on line <b>613</b>
<b>Fatal error</b>: eZ Publish did not finish its request

The execution of eZ Publish was abruptly ended, the debug output is present below.

(( with nothing further below ))

Steps to reproduce

Started the installation over after re-booting with identical result.