I always change an image in the branding images to force version increment, then I check for updates on my roku and verify that the app version has changed from app information page.
Anyway no luck so far, still getting this death screen.
Tried the above, no luck for me. I created a ticket with Partner Sucess over a month ago about this and never heard a word from them.
A possible solution for The Roku Death Screen.
Save the changes and wait for Roku to update the feed.
It worked on 95% of the channels we tried.