KDE plasma freezes when choosing "Restart" or "Shutdown"

Hello everyone.
I have the following issue with my newly installed Mageia 9 (I'm using KDE Plasma with X11).
Every time I choose the "shutdown" or "restart" option from the menu, KDE freezes.
The only way I have to reset the system is by pressing Ctrl-F2, and then login and then typing sudo reboot or sudo poweroff.
I've already checked the error log (with journalctl) but there are no errors from KDE or X11.
Could you please help me?
I have the following issue with my newly installed Mageia 9 (I'm using KDE Plasma with X11).
Every time I choose the "shutdown" or "restart" option from the menu, KDE freezes.
The only way I have to reset the system is by pressing Ctrl-F2, and then login and then typing sudo reboot or sudo poweroff.
I've already checked the error log (with journalctl) but there are no errors from KDE or X11.
Could you please help me?