Urbackupclientgui - Invalid borders specified for theme pixmap

Hi all;
I installed the server and the client on my debian buster system. The programs seem to be installed properly. I then tried to start urbackupclientgui as specified in the instructions. The GUI’s icon shows up in my tray ok but when I try to run it, I get the following errro message:

gary@ctech:/etc$ urbackupclientgui
** (urbackupclientgui:10946): WARNING **: 16:10:03.702: Invalid borders specified for theme pixmap:
borders don’t fit within the image

Does anyone know how to fix this?

Gary R.

Added info:
urbackup server 2.4.9
urbackup client 2.4.8
Kde desktop