Traceback (most recent call last):
  File "app/electrum/gui/common_qt/util.py", line 214, in on_qt_callback_signal
  File "app/electrum/gui/qml/qetransactionlistmodel.py", line 55, in on_event_verified
  File "app/electrum/gui/qml/qetransactionlistmodel.py", line 243, in on_tx_verified
  File "app/electrum/gui/qml/qetransactionlistmodel.py", line 169, in get_section_by_timestamp
TypeError: 'NoneType' object cannot be interpreted as an integer