The application does not start after using the function save current settings

[bohorok]

Describe the bug
In the screen manager application, I turn on both screens. Then I launch the brightness-controller app. Adjusts the image for both screens and saves the configuration: save current settings function.
Then I turn off one screen programmatically and start the brightness-controller application again. The application does not start. An attempt to run in the command line gives the message:

xrandr: Need crtc to set gamma on.
Traceback (most recent call last):
  File "/usr/share/brightness-controller/init.py", line 418, in change_value_pbr
    Executor.execute_command(cmd_value)
  File "/home/khamsin/.local/lib/python3.10/site-packages/brightness_controller_linux/util/executor.py", line 23, in execute_command
    subprocess.check_output(string_cmd, shell=True)
  File "/usr/lib/python3.10/subprocess.py", line 420, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/usr/lib/python3.10/subprocess.py", line 524, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command 'xrandr			--output LVDS1 			--brightness 0.6800000000000004			--gamma 1.0000000000000007:1.0000000000000007:1.0000000000000007' returned non-zero exit status 1.
/usr/bin/brightness-controller: linia 4:  1161 Przerwane               (zrzut pamięci) python init.py

version
2.4

Desktop (please complete the following information):

• archlinux
• de: xfce

Additional context

Screen 0: minimum 8 x 8, current 2646 x 1024, maximum 32767 x 32767
LVDS1 connected primary 1366x768+1280+0 (normal left inverted right x axis y axis) 280mm x 160mm
   1366x768      60.02*+
   1280x720      59.86    60.00    59.74  
   1024x768      60.00  
   1024x576      60.00    59.90    59.82  
   960x540       60.00    59.63    59.82  
   800x600       60.32    56.25  
   864x486       60.00    59.92    59.57  
   640x480       59.94  
   720x405       59.51    60.00    58.99  
   680x384       60.00  
   640x360       59.84    59.32    60.00  
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
VGA1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 380mm x 300mm
   1280x1024     60.02*+  75.02  
   1280x960      60.00  
   1152x864      75.00  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    59.94  
   720x400       70.08  
VIRTUAL1 disconnected (normal left inverted right x axis y axis)