Often dialog asking you if you want to install the listed software packages does not show when attempting to install language packs

[Wise Melon]

I have found that after the most recent update of the gnome-control-center that when going to the "Region & Language" and trying to install a language the box that displays to you which packages will need to be installed and asks you if you do want to install them does not show, simply nothing happens so I am unable to install them. I have also found this to be true when I click "Language" and it should ask me to install additional software packages as I don't have them all for my selected language, but instead, nothing happens...

In terms of Terminal output I find that at first when I launch the gnome-control-center I get this:

    ** (gnome-control-center:9882): WARNING **: Ignoring launcher gufw (missing desktop file)

    ** (gnome-control-center:9882): WARNING **: Ignoring launcher landscape-client-settings (missing desktop file)

    ** (gnome-control-center:9882): WARNING **: Ignoring launcher language-selector (missing desktop file)

    ** (gnome-control-center:9882): WARNING **: Ignoring launcher ubuntuone-installer (missing desktop file)

Then when I go into the "Region & Language" section I get this:

    (gnome-control-center:9882): common-cc-panel-WARNING **: Language en_GB.UTF-8 not installed, trying to install it

When I try to install a language I get this:

    (gnome-control-center:9882): common-cc-panel-WARNING **: Language aa_DJ not installed, trying to install it

And finally when I close the gnome-control-center as nothing more has happened I get this:

    (gnome-control-center:9882): Gtk-CRITICAL **: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed

Though on some occasions all does work as it should, I would say that at least half the time it does not, but if it is working one way it will not work another way unless you restart the gnome-control-center, or at least I have found that to be true.

I have found this issue on Ubuntu GNOME 16.04 with GNOME 3.18 (32-bit) and Ubuntu GNOME 15.10 with GNOME 3.18 (64-bit).

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu GNOME 16.04 (xenial) reached end-of-life in April 2019.

https://ubuntugnome.org/ubuntu-gnome-16-04-lts-is-here/
https://wiki.ubuntu.com/XenialXerus/ReleaseNotes/UbuntuGNOME

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in.