File "/usr/lib/python3/dist-packages/electrum/gui/qt/main_window.py", line 1613, in do_pay
    self.do_pay_invoice(self.pending_invoice)
  File "/usr/lib/python3/dist-packages/electrum/gui/qt/main_window.py", line 1627, in do_pay_invoice
    self.pay_onchain_dialog(self.get_coins(), invoice.outputs)
  File "/usr/lib/python3/dist-packages/electrum/gui/qt/main_window.py", line 1682, in pay_onchain_dialog
    self.save_pending_invoice()
  File "/usr/lib/python3/dist-packages/electrum/gui/qt/main_window.py", line 1605, in save_pending_invoice
    self.wallet.save_invoice(self.pending_invoice)
  File "/usr/lib/python3/dist-packages/electrum/wallet.py", line 752, in save_invoice
    self.save_db()
  File "/usr/lib/python3/dist-packages/electrum/wallet.py", line 302, in save_db
    self.db.write(self.storage)
  File "/usr/lib/python3/dist-packages/electrum/wallet_db.py", line 1239, in write
    self._write(storage)
  File "/usr/lib/python3/dist-packages/electrum/wallet_db.py", line 1247, in _write
    storage.write(self.dump())
  File "/usr/lib/python3/dist-packages/electrum/util.py", line 408, in <lambda>
    return lambda *args, **kw_args: do_profile(args, kw_args)
  File "/usr/lib/python3/dist-packages/electrum/util.py", line 404, in do_profile
    o = func(*args, **kw_args)
  File "/usr/lib/python3/dist-packages/electrum/storage.py", line 85, in write
    with open(temp_path, "w", encoding='utf-8') as f: