Last night when opening the app I was presented with my user selection screen as usual, but upon login the app would immediately crash. It took me a while to realize my AppleTV had auto-updated itself to the latest developer beta which I forgot that I had installed the beta profile.
If there's a way to maybe TestFlight a new beta build that would be great! I have applied for the tvOS beta version today... I already use the BuddyBuild versions on iOS, just not tvOS yet.
I was actually about to load the tvOS 12 beta build but I may hold off... I may even remove the beta altogether and reload from the current production release but if you need my logs or help testing what's causing the crash let me know!