I have this issue as well. I am logged into Disney + app, and I am able to view all of the titles. Once I select a title, it then goes to a black screen. I tried to reset the Smart Hub, with no positive results. I ended up having to do a factory reset on the TV, which resolved the issue, but only temporarirly. Later that same day, the Disney + app returned to the same behavior of showing all the titles, and hanging on a black screen. I am able to use the Disney + apps on all of my non-Samsung TV's, and severly regret my new Samsung TV purchase (less than a month old). My Model is UN75NU6900, software version T-KTSUAKUC-1283.0, sub-micron version T-KTSUINTV-1004.
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