Traceback (most recent call last):
  File "electrum/gui/qt/wizard/wizard.py", line 221, in on_next_button_clicked
  File "electrum/gui/qt/wizard/wizard.py", line 152, in load_next_component
  File "electrum/gui/qt/wizard/wallet.py", line 754, in on_ready
  File "electrum/gui/qt/wizard/wallet.py", line 741, in on_choice_click
TypeError: 'NoneType' object is not subscriptable