Traceback (most recent call last):
  File "app/electrum/gui/qml/util.py", line 27, in on_qt_callback_signal
  File "app/electrum/gui/qml/qetransactionlistmodel.py", line 53, in on_event_verified
  File "app/electrum/gui/qml/qetransactionlistmodel.py", line 237, in on_tx_verified
  File "app/electrum/gui/qml/qetransactionlistmodel.py", line 166, in get_section_by_timestamp
TypeError: 'NoneType' object cannot be interpreted as an integer