Admin panel broke

First of all, thanks for making this plugin. The plugin for the front-end works, but the back-end won’t work. I think the error is in the javascript-part, because of the fact that the menu option on the left of the screen won’t show up when you hover over the menu. Inspect element told me:

Uncaught TypeError: Cannot read property 'xsplit' of undefined

When I edit wordpress-seo-qtranslate-x.php and comment the next line:

//require_once(dirname(__FILE__)."/qwpseo-admin.php");

The error won’t show. But then, nothing happens at the back-end. I tried to figure out what won’t work, but I couldn’t find it yet. Will report you when I find something.

https://wordpress.org/plugins/wp-seo-qtranslate-x/