File "C:\Program Files (x86)\Electrum\electrum_plugins\cosigner_pool\qt.py", line 205, in on_receive
    xprv = wallet.keystore.get_master_private_key(password)
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\keystore.py", line 296, in get_master_private_key
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\bitcoin.py", line 135, in pw_decode