Error when starting main.py

[phobosbg]

I get the following:

pi@raspberrypi:~/Downloads/dashzero-master $ python3 main.py
[INFO   ] [Logger      ] Record log in /home/pi/.kivy/logs/kivy_21-10-30_5.txt
[INFO   ] [Kivy        ] v2.0.0
[INFO   ] [Kivy        ] Installed at "/home/pi/.local/lib/python3.7/site-packages/kivy/__init__.py"
[INFO   ] [Python      ] v3.7.3 (default, Jan 22 2021, 20:04:44)
[GCC 8.3.0]
[INFO   ] [Python      ] Interpreter at "/usr/bin/python3"
[INFO   ] [Factory     ] 186 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil (img_ffpyplayer ignored)
[INFO   ] [Window      ] Provider: sdl2(['window_egl_rpi'] ignored)
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] Backend used <sdl2>
[INFO   ] [GL          ] OpenGL version <b'OpenGL ES 2.0'>
[INFO   ] [GL          ] OpenGL vendor <b'Broadcom'>
[INFO   ] [GL          ] OpenGL renderer <b'VideoCore IV HW'>
[INFO   ] [GL          ] OpenGL parsed version: 2, 0
[INFO   ] [GL          ] Shading version <b'OpenGL ES GLSL ES 1.00'>
[INFO   ] [GL          ] Texture max size <2048>
[INFO   ] [GL          ] Texture max units <8>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [KivyMD      ] 0.104.2, git-bc7d1f5, 2021-06-06 (installed at "/home/pi/.local/lib/python3.7/site-packages/kivymd/__init__.py")
[INFO   ] [Text        ] Provider: sdl2(['text_pango'] ignored)
 :0: UserWarning: You do not have a working installation of the service_identity module: 'No module named 'service_identity''.  Please install it from <https://pypi.python.org/pypi/service_identity> and make sure all of its dependencies are satisfied.  Without the service_identity module, Twisted can perform only rudimentary TLS client hostname verification.  Many valid certificate/hostname mappings may be rejected.
 Traceback (most recent call last):
   File "main.py", line 118, in <module>
     MainApp().run()
   File "main.py", line 61, in __init__
     self.load_theme()
   File "main.py", line 96, in load_theme
     self.theme_cls.theme_style = theme_cfg.get('style', 'Light')
 AttributeError: 'NoneType' object has no attribute 'theme_style'
pi@raspberrypi:~/Downloads/dashzero-master $