File "electrum\gui\qt\main_window.py", line 103, in onPress
  File "electrum\gui\qt\main_window.py", line 3110, in settings_dialog
  File "electrum\gui\qt\main_window.py", line 3038, in update_currencies
  File "electrum\exchange_rate.py", line 458, in get_currencies
  File "electrum\exchange_rate.py", line 430, in get_exchanges_by_ccy