File "/home/user/wspace/electrum/.buildozer/android/platform/build-arm64-v8a/build/python-installs/Electrum/kivy/core/window/window_sdl2.py", line 747, in mainloop
  File "/home/user/wspace/electrum/.buildozer/android/platform/build-arm64-v8a/build/python-installs/Electrum/kivy/core/window/window_sdl2.py", line 479, in _mainloop
  File "/home/user/wspace/electrum/.buildozer/android/platform/build-arm64-v8a/build/python-installs/Electrum/kivy/base.py", line 339, in idle
  File "/home/user/wspace/electrum/.buildozer/android/platform/build-arm64-v8a/build/python-installs/Electrum/kivy/clock.py", line 591, in tick
  File "kivy/_clock.pyx", line 384, in kivy._clock.CyClockBase._process_events
  File "kivy/_clock.pyx", line 414, in kivy._clock.CyClockBase._process_events
  File "kivy/_clock.pyx", line 412, in kivy._clock.CyClockBase._process_events
  File "kivy/_clock.pyx", line 167, in kivy._clock.ClockEvent.tick
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/gui/kivy/main_window.py", line 1299, in <lambda>
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/gui/kivy/main_window.py", line 1303, in _save_backup
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/wallet.py", line 309, in save_backup
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/storage.py", line 69, in __init__