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 1001, in save_invoice
  File "electrum/wallet.py", line 390, in save_db
  File "electrum/wallet_db.py", line 1516, in write
  File "electrum/util.py", line 446, in <lambda>
  File "electrum/util.py", line 442, in do_profile
  File "electrum/wallet_db.py", line 1526, in _write
  File "electrum/storage.py", line 84, in write
PermissionError: [Errno 1] Operation not permitted: '/Users/x/Desktop/default_wallet.backup.tmp.7866'