Traceback (most recent call last):
  File "electrum\gui\qt\util.py", line 1669, in on_qt_callback_signal
  File "electrum\gui\qt\main_window.py", line 429, in on_event_blockchain_updated
  File "electrum\gui\qt\main_window.py", line 1038, in refresh_tabs
  File "electrum\util.py", line 445, in <lambda>
  File "electrum\util.py", line 441, in do_profile
  File "electrum\gui\qt\history_list.py", line 275, in refresh
  File "electrum\util.py", line 445, in <lambda>
  File "electrum\util.py", line 441, in do_profile
  File "electrum\wallet.py", line 1187, in get_full_history
  File "electrum\wallet.py", line 1351, in get_tx_item_fiat
  File "electrum\wallet.py", line 2647, in price_at_timestamp
  File "electrum\exchange_rate.py", line 705, in timestamp_rate
  File "electrum\exchange_rate.py", line 686, in history_rate
  File "electrum\exchange_rate.py", line 162, in historical_rate
decimal.InvalidOperation: [<class 'decimal.ConversionSyntax'>]