File "electrum\gui\qt\__init__.py", line 219, in show_watchtower_dialog
  File "electrum\gui\qt\watchtower_dialog.py", line 72, in __init__
  File "electrum\gui\qt\watchtower_dialog.py", line 39, in __init__
  File "electrum\gui\qt\watchtower_dialog.py", line 50, in update
  File "electrum\lnwatcher.py", line 327, in list_sweep_tx
  File "electrum\network.py", line 374, in run_from_another_thread
  File "concurrent\futures\_base.py", line 435, in result
  File "concurrent\futures\_base.py", line 384, in __get_result
  File "electrum\lnwatcher.py", line 326, in f
  File "electrum\sql_db.py", line 49, in run_sql
  File "electrum\lnwatcher.py", line 73, in list_sweep_tx