Traceback (most recent call last):
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/gui/qt/transaction_dialog.py", line 244, in do_broadcast
    self.main_window.send_tab.save_pending_invoice()
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/gui/qt/send_tab.py", line 529, in save_pending_invoice
    self.wallet.save_invoice(self.pending_invoice)
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/wallet.py", line 1001, in save_invoice
    self.save_db()
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/wallet.py", line 390, in save_db
    self.db.write(self.storage)
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/wallet_db.py", line 1524, in write
    self._write(storage)
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/util.py", line 445, in <lambda>
    return lambda *args, **kw_args: do_profile(args, kw_args)
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/util.py", line 441, in do_profile
    o = func(*args, **kw_args)
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/wallet_db.py", line 1534, in _write
    storage.write(json_str)
  File "/tmp/.mount_electrWRVUwG/usr/lib/python3.9/site-packages/electrum/storage.py", line 87, in write
    os.fsync(f.fileno())
OSError: [Errno 5] Input/output error