I am trying to get randomize 4K wallpaper to be loaded to my desktop. I am using a reddit subreddit called r/ultrahdwallpapers to get the wallpaper via DisplayFusion, however, DisplayFusion will not load images from just this specific subreddit.
I was able to reproduce the issue on my end, so I've added this to our list to look into. We'll be sure to let you know if we have any news on it going forward.
This issue should be fixed up in the latest beta, available here: https://www.displayfusion.com/Download/Beta. Please let me know if you still run into any trouble after updating.