Traceback (most recent call last):
  File "electrum/gui/qt/main_window.py", line 866, in timer_actions
  File "electrum/gui/qt/main_window.py", line 1021, in update_wallet
  File "electrum/gui/qt/main_window.py", line 1028, in update_tabs
  File "electrum/util.py", line 446, in <lambda>
  File "electrum/util.py", line 442, in do_profile
  File "electrum/gui/qt/history_list.py", line 275, in refresh
  File "electrum/util.py", line 446, in <lambda>
  File "electrum/util.py", line 442, 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 2665, in price_at_timestamp
  File "electrum/exchange_rate.py", line 710, in timestamp_rate
  File "electrum/exchange_rate.py", line 691, in history_rate
  File "electrum/exchange_rate.py", line 165, in historical_rate
decimal.InvalidOperation: [<class 'decimal.ConversionSyntax'>]