Blank Screen in dashboard/login

I can login to admin but when I go to the dashboard or any other function under wp-admin the screen is blank, the website seems to be fine. url is http://www.themasterwod.com/

I have been using High end theme for several months with no problems. It worked fine last week. I logged on this Sunday as usual to schedule blog posts but can’t. I have not made any changes so guessing this was caused by some automatic upgrade?

Anytime I go to edit the blog or create a new post the screen is blank, such as; http://www.themasterwod.com/wp-admin/post-new.php

Can you look at my issue?
Thanks