При запуске приложения написанного на Kivy, окно открывается, прорисовывается и закрывается

from kivy.uix.button import Button
from kivy.app import App
from kivy.uix.floatlayout import FloatLayout 
from kivy.config import Config
from kivy.uix.image import Image

Config.set('graphics', 'width', '1080')
Config.set('graphics', 'height', '1920')

class MainApp(App):
    def build(self):
        fl = FloatLayout()
        fl.add_widget(Image(source = 'images/background.png'), index = 1)
        button_strelka = Button(
            background_normal = 'images/Login_grouped/strelka.png',
            background_down = 'images/Login_grouped/strelka2.png',
            size_hint = (.07, .13),
            pos_hint = {'center_x': 0.5, 'top': 0.25}
        )
        button_reg = Button(
            background_normal = 'images/Login_grouped/reg_button.png',
            background_down = 'images/Login_grouped/reg_button_2.png',
            size_hint = (.2, .12),
            pos_hint = {'center_x': 0.5, 'top': 0.12}
        )
        fl.add_widget(button_strelka, index= 0)
        fl.add_widget(button_reg,index=0)
        return fl

if __name__ == '__main__':
    MainApp().run()

Не понимаю, что не так, всё работало и в моменте отрубилось. Ошибок не выдаёт. LOG

[INFO   ] [Logger      ] Record log in /home/dudoser/.kivy/logs/kivy_21-12-26_45.txt
[INFO   ] [Kivy        ] v2.0.0
[INFO   ] [Kivy        ] Installed at "/mnt/c/Users/home/vkapp/vkapp/lib/python3.8/site-packages/kivy/__init__.py"
[INFO   ] [Python      ] v3.8.10 (default, Nov 26 2021, 20:14:08) 
[GCC 9.3.0]
[INFO   ] [Python      ] Interpreter at "/mnt/c/Users/home/vkapp/vkapp/bin/python"
[INFO   ] [Factory     ] 186 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil (img_ffpyplayer ignored)
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [Window      ] Provider: sdl2
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] Backend used <sdl2>
[INFO   ] [GL          ] OpenGL version <b'3.1 Mesa 21.0.3'>
[INFO   ] [GL          ] OpenGL vendor <b'Microsoft Corporation'>
[INFO   ] [GL          ] OpenGL renderer <b'D3D12 (AMD Radeon(TM) Graphics)'>
[INFO   ] [GL          ] OpenGL parsed version: 3, 1
[INFO   ] [GL          ] Shading version <b'1.40'>
[INFO   ] [GL          ] Texture max size <16384>
[INFO   ] [GL          ] Texture max units <32>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [GL          ] NPOT texture support is available
[INFO   ] [Base        ] Start application main loop
[INFO   ] [Base        ] Leaving application in progress...