OSError: [Errno 28] No space left on device

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/satoshi/Electrum-4.4.6/electrum/gui/qt/main_window.py", line 2545, in closeEvent
    self.clean_up()
  File "/home/satoshi/Electrum-4.4.6/electrum/gui/qt/main_window.py", line 2560, in clean_up
    self.config.set_key("is_maximized", self.isMaximized())
  File "/home/satoshi/Electrum-4.4.6/electrum/simple_config.py", line 171, in set_key
    self._set_key_in_user_config(key, value, save)
  File "/home/satoshi/Electrum-4.4.6/electrum/simple_config.py", line 180, in _set_key_in_user_config
    self.save_user_config()
  File "/home/satoshi/Electrum-4.4.6/electrum/simple_config.py", line 272, in save_user_config
    with open(path, "w", encoding='utf-8') as f:
OSError: [Errno 28] No space left on device