Error while installing any plugins

Hi,

I'm on OMV stone-buner 2.2.4 using kernel 4.6.1 freshly upgraded from kralizec.

My problem is that when i want to install plugin from the omextra-plugins repos, installation never go the end and it's impossible for me to install plugins....

For example, i tried to instal a light plug :openmediavault-links 1.5, first, it's very very slow and then i get this :

Reading package lists...
Building dependency tree...
Reading state information...
The following NEW packages will be installed:
openmediavault-links
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/18.9 kB of archives.
After this operation, 86.0 kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
openmediavault-links
Authentication warning overridden.
Selecting previously unselected package openmediavault-links.
(Reading database ... 66305 files and directories currently installed.)
Unpacking openmediavault-links (from .../openmediavault-links_1.5_all.deb) ...
Processing triggers for openmediavault ...
Restarting engine daemon ...
Updating file permissions ...
Purging internal cache ...
Updating locale files ...
Setting up openmediavault-links (1.5) ...
Initialize configuration
Processing triggers for openmediavault ...
Restarting engine daemon ...
Updating file permissions ...
Purging internal cache ...
Updating locale files ...
Creating index of upgradeable packages ...
Creating index of openmediavault plugins ...
W: Duplicate sources.list entry http://ppa.launchpad.net/deluge-team/ppa/ubuntu/ precise/main amd64 Packages (/var/lib/apt/lists/ppa.launchpad.net_deluge-team_ppa_ubuntu_dists_precise_main_binary-amd64_Packages)
W: You may want to run apt-get update to correct these problems
Terminé ...

Other plugin openmediavault-cups :

Reading package lists...
Building dependency tree...
Reading state information...
The following extra packages will be installed:
bc cups cups-client cups-common cups-filters cups-ppdc dc fonts-freefont-ttf
foomatic-db foomatic-db-engine foomatic-filters ghostscript ghostscript-cups
gsfonts hp-ppd hpijs-ppds libcupscgi1 libcupsfilters1 libcupsimage2
libcupsmime1 libcupsppdc1 libgs9 libgs9-common libgutenprint2 libhpmud0
libijs-0.35 libjasper1 libjbig0 libjbig2dec0 liblcms1 liblcms2-2
libopenjpeg2 libpaper1 libpoppler19 libslp1 libtiff4 openprinting-ppds
poppler-data poppler-utils printer-driver-foo2zjs printer-driver-gutenprint
printer-driver-hpcups printer-driver-hpijs printer-driver-splix python
python-cups python-daemon python-lockfile python-lxml python-minimal
python-support python2.7 python2.7-minimal ttf-freefont
Suggested packages:
cups-bsd hplip cups-pdf smbclient xpp hplip-cups cjet foomatic-db-gutenprint
ghostscript-x linuxprinting.org-ppds gutenprint-locales libjasper-runtime
liblcms-utils liblcms2-utils slpd openslp-doc fonts-japanese-mincho
fonts-ipafont-mincho fonts-japanese-gothic fonts-ipafont-gothic
fonts-arphic-ukai fonts-arphic-uming fonts-unfonts-core psutils
hannah-foo2zjs tk8.4 tix gutenprint-doc hplip-doc python-doc python-tk
python-lxml-dbg python2.7-doc binfmt-support
Recommended packages:
colord printer-driver-all hpijs fonts-droid libpaper-utils unzip mscompress
The following NEW packages will be installed:
bc cups cups-client cups-common cups-filters cups-ppdc dc fonts-freefont-ttf
foomatic-db foomatic-db-engine foomatic-filters ghostscript ghostscript-cups
gsfonts hp-ppd hpijs-ppds libcupscgi1 libcupsfilters1 libcupsimage2
libcupsmime1 libcupsppdc1 libgs9 libgs9-common libgutenprint2 libhpmud0
libijs-0.35 libjasper1 libjbig0 libjbig2dec0 liblcms1 liblcms2-2
libopenjpeg2 libpaper1 libpoppler19 libslp1 libtiff4 openmediavault-cups
openprinting-ppds poppler-data poppler-utils printer-driver-foo2zjs
printer-driver-gutenprint printer-driver-hpcups printer-driver-hpijs
printer-driver-splix python python-cups python-daemon python-lockfile
python-lxml python-minimal python-support python2.7 python2.7-minimal
ttf-freefont
0 upgraded, 55 newly installed, 0 to remove and 0 not upgraded.
Need to get 13.3 MB/36.2 MB of archives.
After this operation, 122 MB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
libcupscgi1 libjbig0 libtiff4 libcupsimage2 libcupsmime1 libcupsppdc1
libpaper1 libslp1 liblcms1 libopenjpeg2 libpoppler19 poppler-utils
libijs-0.35 libjasper1 libjbig2dec0 liblcms2-2 poppler-data libgs9-common
libgs9 gsfonts ghostscript cups-common cups-client bc cups-ppdc
libcupsfilters1 fonts-freefont-ttf ttf-freefont cups-filters cups
foomatic-filters foomatic-db-engine libgutenprint2 dc python2.7-minimal
python2.7 python-minimal python python-support foomatic-db ghostscript-cups
hp-ppd libhpmud0 printer-driver-hpijs hpijs-ppds openprinting-ppds
printer-driver-foo2zjs printer-driver-gutenprint printer-driver-hpcups
printer-driver-splix python-cups python-lockfile python-daemon python-lxml
openmediavault-cups
Authentication warning overridden.
Get:1 http://ftp.au.debian.org/debian/ wheezy/main gsfonts all 1:8.11+urwcyr1.0.7~pre44-4.2 [3364 kB]
Get:2 http://ftp.au.debian.org/debian/ wheezy/main fonts-freefont-ttf all 20120503-1 [6024 kB]

>>> *************** Error ***************
communication failure
<<< *************************************