qt4-fsarchiver from obs do not run from plasma5 menu. version found here:

https://build.opensuse.org/package/show?project=home%3AX0F&package=fsarchiver-qt4

when launched from the plasma5 menu, it asks for root passwd then nothing
happen (no window)

journalctl gives:

f�vr. 05 09:14:43 linux-us26 polkitd[1076]: Operator of unix-session:2
successfully authenticated as unix-user:root to gain ONE-SHOT autho
f�vr. 05 09:14:43 linux-us26 pkexec[5622]: pam_unix(polkit-1:session): session
opened for user root by (uid=1000)
f�vr. 05 09:14:43 linux-us26 pkexec[5622]: jdd: Executing command [USER=root]
[TTY=unknown] [CWD=/home/jdd] [COMMAND=/usr/bin/env DISPLAY=


but if launched from a root konsole, runs perfectly...