While browsing Wallhaven today, I noticed that I could not add my favorite wallpapers to the Favorites. Then I wanted to create and add a new collection, but I was able to add only 1 photo. I couldn't add another. Then I wanted to delete my new collection, but I got the error in the photo. As you can see, I can't add wallpapers to my favorites or I can't delete them. In short, I can't touch it.
I wish you could help me.