Window hidden by color patch when calibrating

[pi7602]

Hi !
First of all, many thanks for the great work done in order to have DisplayCAL work again.

I use Linux KDE Neon distro.
I installed DisplayCAL yesterday.
The display and the probe are detected by DisplayCAL.
Problem is that when I click on "Calibrate and Caracterize", it launch a window which says : set this window in the center of the screen.
When I click to launch the calibration, is shows different patches and then stop on a grey patch.

The window with which I would be able to tune the display is hidden by the color patch.

It may be trivial, but is there a way to have the patch and the window apart (separated) ?

Thanks for your help.