Hi Guys

how to fix this problem ?

root@kali:~# apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up extlinux (3:6.03~pre1+dfsg-1kali3) ...
P: Checking for EXTLINUX directory... found.
P: Writing config for /boot/vmlinuz-3.14-kali1-amd64...
I: os-proper disabled in /etc/default/extlinux: Skipping /boot/extlinux/os-proper.cfg
E: /usr/share/EXTLINUX/themes/debian: No such file or directory
dpkg: error processing extlinux (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)