The only solution/workaround is to:
Go to menu, go to reset system, reset it, then after it comes back on, go to smarthub, re-sign in, redownload each app, sign into each app, then they will work until the next time you shut the TV off. This is a Samsung problem, not the app developer, as I have been in contact with all of the apps that this happens to. What actually is happening, upon resetting the system, the old apps actually are not deleted. You will find as you go to the apps after resetting, they are still cached in the memory. I have been round and round with Samsung about this. Had them remote into the TV, everything. To this day, UFCTV app still will not work on my tv, no matter what you do. However the app works flawlessly on every other Samsung I own. Samsung knows they have this problem but... I guess they don't care as it's easier to sell you a new TV. (So much for spending $4000 on the top of the line series 8 & 9 TV's. You should just consider the TV a monitor. Do yourself a favor, go spend $150 to buy a 4K AppleTV for your app use, at least Apple supports their products and has no app crashes or problems. I don't know how Samsung can even call these Smart TV's, if they only are smart for a year or so. I have old Apple 3GS phones that support apps better than this "flagship" TV. Sorry to rant, but everything I typed is 100% accurate and Samsung can verify with my calls into service.
