Synaptic Package Manager will not run -Cinnamon Desktop

When started from the menu, it comes up but lock up as soon as you try to do anything, such as search for a known file (Thunderbird for example).

If run in a terminal via sudo synaptic itnimmediately errors saying that it appears that you are running as root in a wayland environment. As far as I can tell only the xorg/xserver environment is the only thing running.

Dietpi is the latest version (downloaded a week ago).

Can this be similar to KDE Plasma like described in chapter 2.2.5 in the blog?
Wait for a longer time, e.g. monitor it with htop in another xterm window.

Maybe a behaviour of synaptic not being allowed to run with root permissions. And using sudo is doing exactly this, running a command with root permission.