Stopped working

[Quasicitizen]

App stopped working - clicking on icon, but interface does not show up. Reinstall or install different version did not help. Ideas? 🙂
CLI:
┌[me_is_me☮compewtur]-(~)
└> backlight ui
Traceback (most recent call last):
File "/usr/local/bin/backlight", line 43, in
init()
File "/usr/share/tuxedo-backlight-control/ui.py", line 352, in init
root = tk.Tk()
File "/usr/lib/python3.10/tkinter/init.py", line 2299, in init
self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: no display name and no $DISPLAY environment variable

[zimbipw]

both ui and command line tool do not work:
sudo backlight
Traceback (most recent call last):
File "/usr/local/bin/backlight", line 6, in
from backlight_control import BacklightControl, backlight
ModuleNotFoundError: No module named 'backlight_control'

python /usr/share/tuxedo-backlight-control/ui.py   1 
Traceback (most recent call last):
File "/usr/share/tuxedo-backlight-control/ui.py", line 358, in
init()
File "/usr/share/tuxedo-backlight-control/ui.py", line 353, in init
App(root)
File "/usr/share/tuxedo-backlight-control/ui.py", line 51, in init
'color_left': tk.StringVar(self, value=backlight.color_left.capitalize()),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'capitalize'