Thread:Skin talk:Chameleon/Error: XML description is missing an element

I'm getting the following error with MediaWiki 1.24.2:

Original exception: [8a01354d] / Exception from line 78 of /var/www/html/mediawiki/skins/chameleon/src/ComponentFactory.php: /var/www/html/mediawiki/skins/chameleon/layouts/standard.xml: XML description is missing an element: structure.