OSError: [Errno 9] Bad file descriptor

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "electrum\gui\qt\wizard\wizard.py", line 217, in on_next_button_clicked
  File "electrum\gui\qt\wizard\wizard.py", line 229, in submit
  File "electrum\wizard.py", line 74, in resolve_next
  File "electrum\wizard.py", line 720, in do_configure_autoconnect
  File "electrum\simple_config.py", line 111, in _set_config_value
  File "electrum\simple_config.py", line 301, in set_key
  File "electrum\simple_config.py", line 311, in _set_key_in_user_config
  File "electrum\simple_config.py", line 423, in save_user_config
OSError: [Errno 9] Bad file descriptor