Breaks my admin edit post and edit page

This plugin messes up the wp-admin edit pages:

– Many of the page features disappear (e.g.- excerpt, slug, sharing button, Yeost SEO edit boxes)
– Screen Options tab on the top will not open, so I can’t reach the settings to turn page features on/off.
– A box shows up at the bottom of the sidebar for Mobile Featured Image, but there is no way to select an image – no link.

In short, not only does this not allow me to add a smaller featured image for mobile, but it destroys a lot of the other WordPress admin page functionality.

I would love to use this for faster mobile page loads, but it is unusable!