Fail to zenbuntu-desktop package

[lboni2]

Good afternoon people!!

# Zentyal Server 5.1

This pending update of the zenbuntu-desktop package for version 5.1, but when starting the upgrade process of the error. It was see in the log and it consists:

========================================================================
Reading package lists...
Building dependency tree...
Reading state information...
Calculating upgrade...
The following NEW packages will be installed:
  imagemagick imagemagick-6.q16 imagemagick-common libfftw3-double3 liblqr-1-0
  libltdl7 libmagickcore-6.q16-2 libmagickwand-6.q16-2 libnetaddr-ip-perl
  libpam-cap libxatracker2 libxss1 libxvmc1 xserver-xorg-video-all
  xserver-xorg-video-amdgpu xserver-xorg-video-ati xserver-xorg-video-fbdev
  xserver-xorg-video-intel xserver-xorg-video-nouveau xserver-xorg-video-qxl
  xserver-xorg-video-radeon xserver-xorg-video-vesa xserver-xorg-video-vmware
The following packages will be upgraded:
  gnupg gnupg-agent libapt-inst2.0 libapt-pkg5.0 libassuan0 libgcrypt20
  libgnutls-openssl27 libgnutls30 libgpg-error0 libgpgme11 libnpth0 libtasn1-6
  python-talloc zenbuntu-core zenbuntu-desktop zentyal zentyal-ca zentyal-core
  zentyal-dns zentyal-firewall zentyal-network zentyal-ntp zentyal-openvpn
  zentyal-samba zentyal-software
25 upgraded, 23 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,102 kB/12.2 MB of archives.
After this operation, 19.9 MB of additional disk space will be used.
Err:1 http://br.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libxatracker2 amd64 17.2.8-0ubuntu0~16.04.1
  Connection failed
W: --force-yes is deprecated, use one of the options starting with --allow instead.
E: Failed to fetch http://br.archive.ubuntu.com/ubuntu/pool/main/m/mesa/libxatracker2_17.2.8-0ubuntu0~16.04.1_amd64.deb  Connection failed

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Zentyal upgrade failed. Full log at /var/log/zentyal/upgrade.log.
========================================================================

I noticed that "timeout" / "Connection failed" occurred with the libxatracker2 package. I do not know how to upgrade and my server can not update zenbuntu-desktop. Can you give me a tip, tell the way ...

Thank you!
Luciano