File "Electrum-3.2.2-py3.6.egg/electrum_gui/qt/main_window.py", line 645, in timer_actions
  File "Electrum-3.2.2-py3.6.egg/electrum_gui/qt/main_window.py", line 1303, in do_update_fee
  File "Electrum-3.2.2-py3.6.egg/electrum_gui/qt/main_window.py", line 1451, in get_send_fee_estimator
  File "Electrum-3.2.2-py3.6.egg/electrum_gui/qt/amountedit.py", line 124, in get_amount
  File "Electrum-3.2.2-py3.6.egg/electrum/util.py", line 496, in quantize_feerate