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 116, in <lambda>
  File "electrum/gui/qt/network_dialog.py", line 396, in follow_server
  File "electrum/network.py", line 387, in run_from_another_thread
  File "concurrent/futures/_base.py", line 435, in result
  File "concurrent/futures/_base.py", line 384, in __get_result
  File "electrum/network.py", line 1156, in follow_chain_given_server
  File "electrum/network.py", line 1134, in _set_preferred_chain
  File "electrum/simple_config.py", line 162, in set_key
  File "electrum/simple_config.py", line 171, in _set_key_in_user_config
  File "electrum/simple_config.py", line 264, in save_user_config
OSError: [Errno 28] No space left on device