Traceback (most recent call last):
  File "electrum\gui\qt\send_tab.py", line 578, in do_pay_or_get_invoice
  File "electrum\gui\qt\send_tab.py", line 601, in do_pay_invoice
  File "electrum\gui\qt\send_tab.py", line 259, in pay_onchain_dialog
  File "electrum\gui\qt\confirm_tx_dialog.py", line 617, in __init__
  File "electrum\gui\qt\util.py", line 367, in __init__
  File "electrum\gui\qt\confirm_tx_dialog.py", line 120, in update
  File "electrum\gui\qt\confirm_tx_dialog.py", line 636, in update_tx
  File "electrum\gui\qt\send_tab.py", line 251, in <lambda>
  File "electrum\util.py", line 474, in <lambda>
  File "electrum\util.py", line 469, in do_profile
  File "electrum\wallet.py", line 1793, in make_unsigned_transaction
  File "electrum\wallet.py", line 208, in get_locktime_for_new_transaction
  File "electrum\blockchain.py", line 486, in is_tip_stale
  File "electrum\blockchain.py", line 482, in header_at_tip
  File "electrum\util.py", line 1337, in func_wrapper
  File "electrum\blockchain.py", line 469, in read_header
  File "electrum\blockchain.py", line 431, in assert_headers_file_available
FileNotFoundError: Electrum headers_dir does not exist. Was it deleted while running?