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\network_dialog.py", line 109, in <lambda>
  File "electrum\gui\qt\network_dialog.py", line 389, in follow_server
  File "electrum\network.py", line 393, in run_from_another_thread
  File "concurrent\futures\_base.py", line 446, in result
  File "concurrent\futures\_base.py", line 391, in __get_result
  File "electrum\network.py", line 1177, in follow_chain_given_server
  File "electrum\network.py", line 1155, in _set_preferred_chain
  File "electrum\simple_config.py", line 171, in set_key
  File "electrum\simple_config.py", line 180, in _set_key_in_user_config
  File "electrum\simple_config.py", line 273, in save_user_config
OSError: [Errno 28] No space left on device