I'm using the Vagrant based developer's MediaWiki install (https://www.mediawiki.org/wiki/MediaWiki-Vagrant).
When trying to import a Creative Commons test zip file(referenced here https://www.mediawiki.org/wiki/Extension:Html2Wiki#Import_a_blog_post_.2F_webpage_complete) I get an error.
Images import fine.
HTML pages fail with error...
There was an error handling the file upload: DOMXPath::__construct expects parameter 1 to be DOMNode