OSError: [Errno 28] No space left on device

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/site-packages/electrum/gui/qt/network_dialog.py", line 411, in set_server
    self.network.run_from_another_thread(self.network.set_parameters(net_params))
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/site-packages/electrum/network.py", line 387, in run_from_another_thread
    return fut.result(timeout)
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/concurrent/futures/_base.py", line 435, in result
    return self.__get_result()
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/site-packages/electrum/util.py", line 1118, in wrapper
    return await func(*args, **kwargs)
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/site-packages/electrum/network.py", line 617, in set_parameters
    self.config.set_key('server', str(server), True)
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/site-packages/electrum/simple_config.py", line 162, in set_key
    self._set_key_in_user_config(key, value, save)
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/site-packages/electrum/simple_config.py", line 171, in _set_key_in_user_config
    self.save_user_config()
  File "/tmp/.mount_electrQW4noA/usr/lib/python3.7/site-packages/electrum/simple_config.py", line 264, in save_user_config
    f.write(s)
OSError: [Errno 28] No space left on device