OSError: [Errno 28] No space left on device

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "electrum/gui/qt/wizard/wizard.py", line 218, in on_next_button_clicked
  File "electrum/gui/qt/wizard/wizard.py", line 230, 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 28] No space left on device