facebook like frame breaks – no close button

on this post :
http://www.kb-coach.com/%D7%93%D7%9B%D7%90%D7%95%D7%9F-%D7%9E%D7%94-%D7%96%D7%94-%D7%93%D7%9B%D7%90%D7%95%D7%9F-%D7%95%D7%94%D7%90%D7%9D-%D7%90%D7%A4%D7%A9%D7%A8-%D7%9C%D7%A6%D7%90%D7%AA-%D7%9E%D7%93%D7%9B%D7%90%D7%95/

when i press the like button the frame that opens i cant see the button : close and “add a comment”

https://wordpress.org/plugins/super-socializer/