┌──(root㉿kali)-[~]
└─# kali-undercover --backtrack
ERROR: Undercover Mode only works on Xfce desktop

┌──(root㉿kali)-[~]
└─# apt install kali-desktop-xfce
kali-desktop-xfce is already the newest version (2026.1.8).
Summary:
Upgrading: 0, Installing: 0, Removing: 0, Not Upgrading: 0

repeat this command

*kali-undercover --backtrack
then

(xfce4-panel:11611): xfce4-panel-WARNING **: 08:36:01.829: Failed to connect to session manager: Failed to connect to the session manager: SESSION_MANAGER environment variable not defined

| |/ / | ()
| ' // ` | | |
| . \ (| | | |
||\\,||_|

root@kali:~#
(wrapper-2.0:11682): WARNING : 08:36:04.100: Binding 'XF86AudioLowerVolume' failed!

(wrapper-2.0:11682): WARNING : 08:36:04.105: Binding 'XF86AudioRaiseVolume' failed!

(wrapper-2.0:11682): WARNING : 08:36:04.108: Binding 'XF86AudioMute' failed!

(wrapper-2.0:11684): xfce4-power-manager-plugin-WARNING **: 08:36:04.122: Xfce4-power-manager: The panel plugin is present, so the tray icon gets disabled.

(wrapper-2.0:11682): WARNING : 08:36:04.168: Binding 'XF86AudioMicMute' failed!

(wrapper-2.0:11682): xfce4-pulseaudio-plugin-WARNING **: 08:36:04.168: Could not have grabbed volume control keys. Is another volume control application (xfce4-volumed) running?

(wrapper-2.0:11682): WARNING : 08:36:04.169: Binding 'XF86AudioPlay' failed!

(wrapper-2.0:11682): WARNING : 08:36:04.169: Binding 'XF86AudioStop' failed!

(wrapper-2.0:11682): WARNING : 08:36:04.170: Binding 'XF86AudioPrev' failed!

(wrapper-2.0:11682): WARNING : 08:36:04.171: Binding 'XF86AudioNext' failed!

(wrapper-2.0:11682): xfce4-pulseaudio-plugin-WARNING **: 08:36:04.171: Could not have grabbed multimedia control keys.

** not restore properly few error
then i used
rm -rf ~/.config/xfce4 ~/.cache/xfce4
reboot
then get back my old theme