Dear Maintainer,
On the Screenlock page under Personalization, no picture is selected by
default and the preview is blank. "Reset To Default" does not fix the
problem.
The configured default background path points to a file that does not
exist, so the UI cannot match it against the available picture list.
Expected result:
A valid default picture should be selected and shown in the preview, and
"Reset To Default" should restore a usable background.
This issue is also related to ukui-screensaver, which provides the
screenlock UI plugin and background configuration.