Traceback (most recent call last):
  File "/usr/bin/apturl-gtk", line 43, in <module>
    ui = GtkUI()
  File "/usr/lib/python3/dist-packages/AptUrl/gtk/GtkUI.py", line 35, in __init__
    self.backend = get_backend(self.dia)
  File "/usr/lib/python3/dist-packages/AptUrl/gtk/backend/__init__.py", line 49, in get_backend
    return InstallBackendAptdaemon(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/AptUrl/gtk/backend/InstallBackendAptdaemon.py", line 21, in __init__
    InstallBackend.__init__(self, window_main)
TypeError: __init__() takes exactly 3 arguments (2 given)