Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/electrum/gui/qt/receive_tab.py", line 73, in on_expiry
    self.config.set_key('request_expiry', evl_keys[i])
  File "/usr/lib/python3/dist-packages/electrum/simple_config.py", line 171, in set_key
    self._set_key_in_user_config(key, value, save)
  File "/usr/lib/python3/dist-packages/electrum/simple_config.py", line 180, in _set_key_in_user_config
    self.save_user_config()
  File "/usr/lib/python3/dist-packages/electrum/simple_config.py", line 272, in save_user_config
    with open(path, "w", encoding='utf-8') as f:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
OSError: [Errno 30] Read-only file system: '/home/user/.electrum/config'