We have detected an issue for the new iOS update and our engineering is working on a fix right now.
Meanwhile there is a possible work around that might help, you can go to watch.slingbox.com from either
browser- Chrome, Internet Explorer or Firefox. Which may lead you to access your sling account.
We will keep you posted as soon as we submit the updated app on Slingbox.com.
The fix will require an update to the app.
Sling Media Support