In some cases, when you change the configuration of objects for which you need to set a location or select a value from the drop-down list, when you click on the button to select a location or list value, they do not open.
Note
In fact, the location selection window or a drop-down list are opened outside the interface shell, and therefore are not visible to the user.
To resolve this problem, select a different desktop environment and restart Axxon One. For example, use Gnome Classic instead of Gnome for Debian 11.