Traceback (most recent call last):
  File "electrum\gui\qt\main_window.py", line 1468, in spend_max
  File "electrum\gui\qt\main_window.py", line 1460, in <lambda>
  File "electrum\wallet.py", line 1424, in make_unsigned_transaction
  File "electrum\wallet.py", line 216, 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 1189, 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?