upgrade from imscp-1.1.0-rc3 to imscp-1.1.0-rc4

ui have this error ...

autoinstaller::Adapter::Debian::installPreRequiredPackages: Reading package
lists...
Building dependency tree...
Reading state information...
aptitude is already the newest version.
debconf-utils is already the newest version.
dialog is already the newest version.
liblist-moreutils-perl is already the newest version.
libxml-simple-perl is already the newest version.
wget is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 29 not upgraded.
3 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up gnobots2 (1:3.4.2-3) ...
chown: invalid group: `root:games'
dpkg: error processing gnobots2 (--configure):
subprocess installed post-installation script returned error exit status 1
Setting up gnotski (1:3.4.2-3) ...
chown: invalid group: `root:games'
dpkg: error processing gnotski (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of gnome-games:
gnome-games depends on gnobots2 (>= 1:3.4.2-3); however:
Package gnobots2 is not configured yet.
gnome-games depends on gnotski (>= 1:3.4.2-3); however:
Package gnotski is not configured yet.

dpkg: error processing gnome-games (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
gnobots2
gnotski
gnome-games
E: Sub-process /usr/bin/dpkg returned an error code (1)
iMSCP::Debug::END: Exit code: 1
root@ns1:/usr/local/src/imscp-1.1.0-rc4.1#

idkw