No response from the program - PyGIWarning: Gtk was imported without specifying a version first.

[ghost]

I'm trying to run a program. I have mistakes.

fakexrandr-manage      
/usr/bin/fakexrandr-manage:37: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, Gdk
/usr/bin/fakexrandr-manage:571: DeprecationWarning: Gtk.ScrolledWindow.add_with_viewport is deprecated
  actual_scroller.add_with_viewport(self.scroller_window)
/usr/bin/fakexrandr-manage:573: PyGTKDeprecationWarning: Using positional arguments with the GObject constructor has been deprecated. Please specify keyword(s) for "label" or use a class specific constructor. See: https://wiki.gnome.org/PyGObject/InitializerDeprecations
  button = Gtk.Button("Create")
Xlib:  extension "RANDR" missing on display ":0".
Traceback (most recent call last):
  File "/usr/bin/fakexrandr-manage", line 732, in <module>
    perform_action(action)
  File "/usr/bin/fakexrandr-manage", line 644, in perform_action
    wnd = MainWindow()
  File "/usr/bin/fakexrandr-manage", line 622, in __init__
    self.load_displays()
  File "/usr/bin/fakexrandr-manage", line 517, in load_displays
    self._displays = query_xrandr()
  File "/usr/bin/fakexrandr-manage", line 144, in query_xrandr
    for i in range(screen_resources.contents.ncrtc):
ValueError: NULL pointer access

I migrated from Nouveau to Nvidia

OS: Arch Linux
plasmashell --version && kf5-config --version                    
plasmashell 5.23.0
Qt: 5.15.2
Szkielety KDE: 5.87.0
kf5-config: 1.0

[phillipberndt]

Xlib: extension "RANDR" missing on display ":0".

Fakexrandr needs randr support.

Are you sure you run X11 and not Wayland with X11 emulation?