File "electrum\gui\qt\main_window.py", line 738, in timer_actions
  File "electrum\gui\qt\main_window.py", line 861, in update_wallet
  File "electrum\gui\qt\main_window.py", line 868, in update_tabs
  File "electrum\util.py", line 356, in <lambda>
  File "electrum\util.py", line 352, in do_profile
  File "electrum\gui\qt\history_list.py", line 241, in refresh
  File "electrum\util.py", line 356, in <lambda>
  File "electrum\util.py", line 352, in do_profile
  File "electrum\wallet.py", line 535, in get_full_history
  File "electrum\wallet.py", line 599, in get_tx_item_fiat
  File "electrum\wallet.py", line 1421, in average_price