Traceback (most recent call last):
  File "kivy/_clock.pyx", line 645, in kivy._clock.CyClockBase._process_events
  File "kivy/_clock.pyx", line 218, in kivy._clock.ClockEvent.tick
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/gui/kivy/main_window.py", line 249, in update_history
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/gui/kivy/uix/screens.py", line 158, in update
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/util.py", line 445, in <lambda>
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/util.py", line 441, in do_profile
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/wallet.py", line 1175, in get_full_history
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/wallet.py", line 1339, in get_tx_item_fiat
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/wallet.py", line 2673, in price_at_timestamp
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/exchange_rate.py", line 685, in timestamp_rate
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/exchange_rate.py", line 666, in history_rate
  File "/home/user/wspace/electrum/.buildozer/android/app/electrum/exchange_rate.py", line 158, in historical_rate
decimal.InvalidOperation: [<class 'decimal.ConversionSyntax'>]