File "/data/user/0/org.electrum.electrum/files/app/crystax_python/site-packages/kivy/core/window/window_sdl2.py", line 727, in mainloop
    self._mainloop()
  File "/data/user/0/org.electrum.electrum/files/app/crystax_python/site-packages/kivy/core/window/window_sdl2.py", line 482, in _mainloop
    event = self._win.poll()
  File "kivy/core/window/_window_sdl2.pyx", line 624, in kivy.core.window._window_sdl2._WindowSDL2Storage.poll