File "site-packages\electrum-3.2.2-py3.5.egg\electrum_gui\qt\network_dialog.py", line 447, in set_server
  File "site-packages\electrum-3.2.2-py3.5.egg\electrum\network.py", line 538, in set_parameters
  File "site-packages\electrum-3.2.2-py3.5.egg\electrum\network.py", line 242, in func_wrapper
  File "site-packages\electrum-3.2.2-py3.5.egg\electrum\network.py", line 554, in switch_lagging_interface
  File "site-packages\electrum-3.2.2-py3.5.egg\electrum\blockchain.py", line 278, in read_header