File "/usr/lib/python3/dist-packages/electrum/gui/qt/main_window.py", line 1113, in <lambda>
    self.create_lightning_invoice_button.clicked.connect(lambda: self.create_invoice(True))
  File "/usr/lib/python3/dist-packages/electrum/gui/qt/main_window.py", line 1209, in create_invoice
    key = self.wallet.lnworker.add_request(amount, message, expiry)
  File "/usr/lib/python3/dist-packages/electrum/lnworker.py", line 1132, in add_request
    raise Exception(_("add invoice timed out"))