When the view stays the same

Automatic changes require Morrowpane in the menu bar. Check that the schedule is not Manual or paused. Quit stops scheduling, and sleep or Low Power Mode pauses it.

The selected collection needs at least one valid image and the target display must be connected. Preview changes do not apply until you choose Apply Wallpaper or Shuffle.

A damaged or missing image can prevent rendering. The last successful wallpaper is retained. Re-import the image or select a different collection, then try again.

Send your app version, macOS version, the steps you took, and redacted error text. Do not attach personal images or library exports unless needed and specifically requested.