Package: xfdesktop4
Version: 4.20.1-1
Package: xfce4
Version: 4.20.1
## steps to reproduce
1. Right click desktop, select "Desktop Settings..."
(2 error windows popped at the same time, says
```
Unable to load images from folder ("null")
Operation was canceled
```
)
2. Change wallpaper, nothing happens
3. Change wallpaper "style" to "None", nothing happens
4. Change "Color" to "Solid" and pick a color, nothing happens
## logs
```
% xfconf-query -c xfce4-desktop -m
Start monitoring channel "xfce4-desktop":
set: /backdrop/screen0/monitor0/workspace5/image-style
set: /backdrop/screen0/monitor0/workspace5/last-image
set: /backdrop/screen0/monitor0/workspace5/last-image
set: /backdrop/screen0/monitor0/workspace5/last-image
set: /backdrop/screen0/monitor0/workspace5/color-style
```
xfdesktop was launched with `xfdesktop -e` and piped to a log file, but the log file is empty.