Traceback (most recent call last):
  File "/app/lib/python3.8/site-packages/electrum/gui/qt/transaction_dialog.py", line 247, in do_broadcast
    self.main_window.save_pending_invoice()
  File "/app/lib/python3.8/site-packages/electrum/gui/qt/main_window.py", line 1642, in save_pending_invoice
    self.wallet.save_invoice(self.pending_invoice)
  File "/app/lib/python3.8/site-packages/electrum/wallet.py", line 793, in save_invoice
    self.save_db()
  File "/app/lib/python3.8/site-packages/electrum/wallet.py", line 315, in save_db
    self.db.write(self.storage)
  File "/app/lib/python3.8/site-packages/electrum/wallet_db.py", line 1354, in write
    self._write(storage)
  File "/app/lib/python3.8/site-packages/electrum/util.py", line 420, in <lambda>
    return lambda *args, **kw_args: do_profile(args, kw_args)
  File "/app/lib/python3.8/site-packages/electrum/util.py", line 416, in do_profile
    o = func(*args, **kw_args)
  File "/app/lib/python3.8/site-packages/electrum/wallet_db.py", line 1364, in _write
    storage.write(json_str)
  File "/app/lib/python3.8/site-packages/electrum/storage.py", line 98, in write
    os.chmod(self.path, mode)
OSError: [Errno 38] Function not implemented: '/run/user/1000/doc/bc6315c0/2021_october'