Hey There Jasper52,
I would try deleting the app and then reinstalling it, this has proved to be a working fix for this issue in the past and it should definitely do the trick for you.
If you have any other questions, feel free to respond or give us a call at 1-877-467-5464. We are open seven days a week, 10:00am to 10:00pm EST.
The Sling Media Moderation Team