File "electrum\gui\qt\main_window.py", line 119, in onPress
  File "electrum\gui\qt\main_window.py", line 2964, in settings_dialog
  File "electrum\gui\qt\settings_dialog.py", line 423, in __init__
  File "electrum\gui\qt\settings_dialog.py", line 351, in update_currencies
  File "electrum\exchange_rate.py", line 476, in get_currencies
  File "electrum\exchange_rate.py", line 448, in get_exchanges_by_ccy