Traceback (most recent call last):
  File "electrum\gui\qt\main_window.py", line 2177, in do_process_from_text
  File "electrum\gui\qt\main_window.py", line 1109, in show_transaction
  File "electrum\gui\qt\transaction_dialog.py", line 420, in show_transaction
  File "electrum\gui\qt\transaction_dialog.py", line 565, in __init__
  File "electrum\gui\qt\transaction_dialog.py", line 910, in update
  File "electrum\wallet.py", line 3179, in get_tx_fee_warning
AssertionError: fee=-9895000 must be non-negative satoshis