Smush now causes my site to not display at all

I have been using Smush for quite a while now but now my web site won't display at all unless I deactivate Smush.

I have never been able to use the Dashboard plugin without problems so I only activate the dashboard to install Smush updates. I updated Smush today and my site still won't display at all. I tried just activating the WPMU dashboard alone without Smush and my site won't display with just the dashboard activated so this will make support more difficult.