Comment 10 for bug 1176701

$ do-release-upgrade -f DistUpgradeViewGtk3
Checking for a new Ubuntu release
Traceback (most recent call last):
  File "/usr/bin/do-release-upgrade", line 144, in <module>
    fetcher = get_fetcher(options.frontend, m.new_dist, options.data_dir)
  File "/usr/bin/do-release-upgrade", line 31, in get_fetcher
    _("Downloading the release upgrade tool"))
  File "/usr/lib/python3/dist-packages/DistUpgrade/GtkProgress.py", line 36, in __init__
    self.widgets = SimpleGtkbuilderApp(uifile, "ubuntu-release-upgrader")
  File "/usr/lib/python3/dist-packages/DistUpgrade/SimpleGtk3builderApp.py", line 32, in __init__
    self.builder.add_from_file(path)
  File "/usr/lib/python3/dist-packages/gi/types.py", line 47, in function
    return info.invoke(*args, **kwargs)
gi._glib.GError: Failed to open file '/usr/share/ubuntu-release-upgrader/gtkbuilder/AcquireProgress.ui': No such file or directory