error in software-properties (gtk & qt)

[spaccabbits]

running the program in question I get these errors and can't manage the repositories
for GTK

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Traceback (most recent call last):
  File "/usr/bin/software-properties-gtk", line 100, in <module>
    app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 162, in __init__
    SoftwareProperties.__init__(self, options=options, datadir=datadir)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 108, in __init__
    self.reload_sourceslist()
    ~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 605, in reload_sourceslist
    self.distro.get_sources(self.sourceslist)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/aptsources/distro.py", line 92, in get_sources
    raise NoDistroTemplateException(
    ...<2 lines>...
    )
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for sparky/seven-sisters

for QT the same with extra at the beginning

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QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
regards