Can't edit page contents

Hey I installed this theme and when i try to go edit any page content it doesn't let me do anything. I've attached a screenshot showing what happens. Nothing shows up in the box. Also in another screenshot, I keep getting this message every time I refresh even if I hit the "don't show this message again".

I'm not sure what the issue is. Can somebody please help me.

http://postimg.org/image/w51b1i0zd/
http://postimg.org/image/jivy0owv7/

Thanks.