failure to create a liveCD on ubuntu16.04.1LTS

When trying to create a liveCD using this toolkit, I selected a few languages, then I picked option for automatic rather than manual.
This is the error that was displayed:
------------------------------------------------------------------------------------------------------
Building failed.

Please look at /home/primus/tmp/build.log to see what went wrong.

If you cannot find the problem, please send a support request at:

 https://launchpad.net/products/uck/+addticket

----------------------------------------------------------------------------------------------------
These are the contents of the log file described above
----------------------------------------------------------------------------------------------------
Build (/usr/bin/uck-gui --wait-before-exit) started at 2017-02-04 08:27:22
>> Ubuntu Customization Kit 2.4.7 on Ubuntu 16.04, 4.4.0-59-generic x86_64
Starting CD remastering on Sat Feb 4 08:27:29 CST 2017
Customization dir=/home/primus/tmp/customization-scripts
Mounting ISO image...
mount: /dev/loop0 is write-protected, mounting read-only
Unpacking ISO image...
Unmounting ISO image...
Mounting SquashFS image...
Unpacking SquashFS image...
Unmounting SquashFS image...
Creating apt cache...
Creating root home...
Mounting /proc
Mounting /sys
Mounting /dev/pts
Mounting /tmp
Mounting /home/primus/tmp/remaster-root-home
Mounting /home/primus/tmp/remaster-apt-cache
Mounting /run
Mounting /home/primus/tmp/customization-scripts
Copying fstab/mtab...
Creating DBUS uuid...
Deactivating initctl...
Deactivating update-grub...
Deactivating grub-probe...
Hacking grub-probe postinst/postrm...
Remembering kernel update state...
>> Customizing: Ubuntu 16.04, 4.4.0-31-generic x86_64
Hit:1 http://archive.ubuntu.com/ubuntu xenial InRelease
Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Get:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]
Get:4 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [207 kB]
Get:5 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [463 kB]
Get:6 http://security.ubuntu.com/ubuntu xenial-security/main Translation-en [86.8 kB]
Get:7 http://security.ubuntu.com/ubuntu xenial-security/main amd64 DEP-11 Metadata [68.2 kB]
Get:8 http://security.ubuntu.com/ubuntu xenial-security/main DEP-11 64x64 Icons [43.0 kB]
Get:9 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [6828 B]
Get:10 http://security.ubuntu.com/ubuntu xenial-security/restricted Translation-en [2272 B]
Get:11 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 DEP-11 Metadata [200 B]
Get:12 http://archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [183 kB]
Get:13 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [306 kB]
Get:14 http://archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [187 kB]
Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [6828 B]
Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/restricted Translation-en [2272 B]
AppStream cache update completed, but some metadata was ignored due to errors.
Fetched 1766 kB in 2s (691 kB/s)
Reading package lists...
Installing language packs (de
en
ru)...
Reading package lists...
Building dependency tree...
Reading state information...
language-pack-de is already the newest version (1:16.04+20160627).
language-pack-de-base is already the newest version (1:16.04+20160627).
language-pack-en-base is already the newest version (1:16.04+20160627).
language-pack-gnome-de is already the newest version (1:16.04+20160627).
language-pack-gnome-de-base is already the newest version (1:16.04+20160627).
language-pack-gnome-en-base is already the newest version (1:16.04+20160627).
language-pack-gnome-ru is already the newest version (1:16.04+20160627).
language-pack-gnome-ru-base is already the newest version (1:16.04+20160627).
language-pack-ru is already the newest version (1:16.04+20160627).
language-pack-ru-base is already the newest version (1:16.04+20160627).
The following packages will be upgraded:
  language-pack-en language-pack-gnome-en
2 upgraded, 0 newly installed, 0 to remove and 388 not upgraded.
Need to get 314 kB of archives.
After this operation, 2078 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 language-pack-en all 1:16.04+20161009 [145 kB]
Get:2 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 language-pack-gnome-en all 1:16.04+20161009 [169 kB]
Fetched 314 kB in 1s (183 kB/s)
(Reading database ...
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 191926 files and directories currently installed.)
Preparing to unpack .../language-pack-en_1%3a16.04+20161009_all.deb ...
Unpacking language-pack-en (1:16.04+20161009) over (1:16.04+20160627) ...
Replacing files in old package language-pack-en-base (1:16.04+20160627) ...
Preparing to unpack .../language-pack-gnome-en_1%3a16.04+20161009_all.deb ...
Unpacking language-pack-gnome-en (1:16.04+20161009) over (1:16.04+20160627) ...
Replacing files in old package language-pack-gnome-en-base (1:16.04+20160627) ...
Setting up language-pack-en (1:16.04+20161009) ...
Setting up language-pack-gnome-en (1:16.04+20161009) ...
W: --force-yes is deprecated, use one of the options starting with --allow instead.
Removing unnecessary language packages...
Reading package lists...
Building dependency tree...
Reading state information...
The following packages will be REMOVED:
  firefox-locale-es* firefox-locale-fr* firefox-locale-it* firefox-locale-pt*
  firefox-locale-zh-hans* language-pack-es* language-pack-es-base*
  language-pack-fr* language-pack-fr-base* language-pack-gnome-es*
  language-pack-gnome-es-base* language-pack-gnome-fr*
  language-pack-gnome-fr-base* language-pack-gnome-it*
  language-pack-gnome-it-base* language-pack-gnome-pt*
  language-pack-gnome-pt-base* language-pack-gnome-zh-hans*
  language-pack-gnome-zh-hans-base* language-pack-it* language-pack-it-base*
  language-pack-pt* language-pack-pt-base* language-pack-zh-hans*
  language-pack-zh-hans-base*
0 upgraded, 0 newly installed, 25 to remove and 379 not upgraded.
After this operation, 132 MB disk space will be freed.
(Reading database ...
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 191943 files and directories currently installed.)
Removing firefox-locale-es (47.0+build3-0ubuntu0.16.04.1) ...
Removing firefox-locale-fr (47.0+build3-0ubuntu0.16.04.1) ...
Removing firefox-locale-it (47.0+build3-0ubuntu0.16.04.1) ...
Removing firefox-locale-pt (47.0+build3-0ubuntu0.16.04.1) ...
Removing firefox-locale-zh-hans (47.0+build3-0ubuntu0.16.04.1) ...
Removing language-pack-gnome-es-base (1:16.04+20160627) ...
Purging configuration files for language-pack-gnome-es-base (1:16.04+20160627) ...
Removing language-pack-es-base (1:16.04+20160627) ...
Purging configuration files for language-pack-es-base (1:16.04+20160627) ...
Removing language-pack-gnome-fr-base (1:16.04+20160627) ...
Purging configuration files for language-pack-gnome-fr-base (1:16.04+20160627) ...
Removing language-pack-fr-base (1:16.04+20160627) ...
Purging configuration files for language-pack-fr-base (1:16.04+20160627) ...
Removing language-pack-gnome-it-base (1:16.04+20160627) ...
Purging configuration files for language-pack-gnome-it-base (1:16.04+20160627) ...
Removing language-pack-gnome-pt-base (1:16.04+20160627) ...
Purging configuration files for language-pack-gnome-pt-base (1:16.04+20160627) ...
Removing language-pack-gnome-zh-hans-base (1:16.04+20160627) ...
Purging configuration files for language-pack-gnome-zh-hans-base (1:16.04+20160627) ...
Removing language-pack-it-base (1:16.04+20160627) ...
Purging configuration files for language-pack-it-base (1:16.04+20160627) ...
Removing language-pack-pt-base (1:16.04+20160627) ...
Purging configuration files for language-pack-pt-base (1:16.04+20160627) ...
Removing language-pack-zh-hans-base (1:16.04+20160627) ...
Purging configuration files for language-pack-zh-hans-base (1:16.04+20160627) ...
Removing language-pack-gnome-es (1:16.04+20160627) ...
Removing language-pack-es (1:16.04+20160627) ...
Removing language-pack-gnome-fr (1:16.04+20160627) ...
Removing language-pack-fr (1:16.04+20160627) ...
Removing language-pack-gnome-it (1:16.04+20160627) ...
Removing language-pack-gnome-pt (1:16.04+20160627) ...
Removing language-pack-gnome-zh-hans (1:16.04+20160627) ...
Removing language-pack-it (1:16.04+20160627) ...
Removing language-pack-pt (1:16.04+20160627) ...
Removing language-pack-zh-hans (1:16.04+20160627) ...
Processing triggers for bamfdaemon (0.5.3~bzr0+16.04.20160701-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
W: --force-yes is deprecated, use one of the options starting with --allow instead.
Done
Restoring kernel update state...
Reactivating initctl...
Reactivating update-grub...
Reactivating grub-probe...
Reactivating grub-probe postinst/postrm...
Removing /home/username directory...
Removing generated machine uuid...
Removing generated fstab/mtab...
Removing crash reports...
Unmounting /home/primus/tmp/remaster-root/var/cache/apt...
Unmounting /home/primus/tmp/remaster-root/tmp/customization-scripts...
Unmounting /home/primus/tmp/remaster-root/tmp...
Unmounting /home/primus/tmp/remaster-root/sys...
Unmounting /home/primus/tmp/remaster-root/run...
Unmounting /home/primus/tmp/remaster-root/root...
Unmounting /home/primus/tmp/remaster-root/proc...
Unmounting /home/primus/tmp/remaster-root/dev/pts...
Cleaning up temporary directories...
Running ISO customization script /home/primus/tmp/customization-scripts/customize_iso...
--2017-02-04 08:29:48-- http://archive.ubuntu.com/ubuntu/ubuntu/ubuntu/dists/xenial/main/source/Sources.gz
Resolving archive.ubuntu.com (archive.ubuntu.com)... 91.189.88.161, 91.189.88.152, 91.189.88.149, ...
Connecting to archive.ubuntu.com (archive.ubuntu.com)|91.189.88.161|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1102678 (1.1M) [application/x-gzip]
Saving to: ‘/tmp/tmp.Ph6Idso64K/Sources.gz’

     0K .......... .......... .......... .......... .......... 4% 122K 8s
    50K .......... .......... .......... .......... .......... 9% 122K 8s
   100K .......... .......... .......... .......... .......... 13% 25.0M 5s
   150K .......... .......... .......... .......... .......... 18% 450M 4s
   200K .......... .......... .......... .......... .......... 23% 161K 4s
   250K .......... .......... .......... .......... .......... 27% 6.81M 3s
   300K .......... .......... .......... .......... .......... 32% 606M 2s
   350K .......... .......... .......... .......... .......... 37% 9.08M 2s
   400K .......... .......... .......... .......... .......... 41% 459K 2s
   450K .......... .......... .......... .......... .......... 46% 22.7M 1s
   500K .......... .......... .......... .......... .......... 51% 10.5M 1s
   550K .......... .......... .......... .......... .......... 55% 7.20M 1s
   600K .......... .......... .......... .......... .......... 60% 25.6M 1s
   650K .......... .......... .......... .......... .......... 65% 11.9M 1s
   700K .......... .......... .......... .......... .......... 69% 24.7M 1s
   750K .......... .......... .......... .......... .......... 74% 47.9M 0s
   800K .......... .......... .......... .......... .......... 78% 14.4M 0s
   850K .......... .......... .......... .......... .......... 83% 524K 0s
   900K .......... .......... .......... .......... .......... 88% 26.5M 0s
   950K .......... .......... .......... .......... .......... 92% 7.83M 0s
  1000K .......... .......... .......... .......... .......... 97% 166M 0s
  1050K .......... .......... ...... 100% 22.1M=1.4s

2017-02-04 08:29:50 (777 KB/s) - ‘/tmp/tmp.Ph6Idso64K/Sources.gz’ saved [1102678/1102678]

--2017-02-04 08:29:50-- http://archive.ubuntu.com/ubuntu/ubuntu/ubuntu/pool/main/g/gfxboot-theme-ubuntu/
Resolving archive.ubuntu.com (archive.ubuntu.com)... 91.189.88.162, 91.189.88.161, 91.189.88.152, ...
Connecting to archive.ubuntu.com (archive.ubuntu.com)|91.189.88.162|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 6465 (6.3K) [text/html]
Saving to: ‘index.html’

     0K ...... 100% 190M=0s

2017-02-04 08:29:51 (190 MB/s) - ‘index.html’ saved [6465/6465]

tar (child): *.tar.gz: Cannot open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now
Unable to extract gfxboot-theme-ubuntu source package
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.

-