Traceback (most recent call last):
  File "electrum\gui\qt\transaction_dialog.py", line 244, in do_broadcast
  File "electrum\gui\qt\send_tab.py", line 529, in save_pending_invoice
  File "electrum\wallet.py", line 998, in save_invoice
  File "electrum\wallet.py", line 393, in save_db
  File "electrum\wallet_db.py", line 1514, in write
  File "electrum\util.py", line 445, in <lambda>
  File "electrum\util.py", line 441, in do_profile
  File "electrum\wallet_db.py", line 1524, in _write
  File "electrum\storage.py", line 84, in write
FileNotFoundError: [Errno 2] No such file or directory: 'q:\\default_wallet.tmp.2784'