I have a Roku Ultra that was configured to use the 4K Screensaver after 30 minutes. It was working properly until about a week ago (as best I can estimate). Recently I noticed that instead of rotating through the images, it now just shows the "4K Screensaver" title image and never rotates through images. When I go to the select-a-screensaver page in settings and click on the 4K Screensaver and preview it, it shows a black screen. It also says there are no photos in that screensaver, or the Aquatic Life screen saver. The only one that has photos now is the Bing Picture of the Day screensaver.
Has something changed with a recent update that may have affected this?
Is there something I could have done that would cause this issue?