Traceback (most recent call last):
  File "electrum\gui\qt\confirm_tx_dialog.py", line 66, in timer_actions
  File "electrum\gui\qt\confirm_tx_dialog.py", line 87, in update_tx
  File "electrum\gui\qt\transaction_dialog.py", line 901, in get_fee_estimator
  File "electrum\gui\qt\amountedit.py", line 142, in get_amount
  File "electrum\util.py", line 773, in quantize_feerate
decimal.InvalidOperation: [<class 'decimal.InvalidOperation'>]