Traceback (most recent call last):
  File "electrum\gui\qt\send_tab.py", line 191, in spend_max
  File "electrum\gui\qt\send_tab.py", line 183, in <lambda>
  File "electrum\wallet.py", line 1670, in make_unsigned_transaction
  File "electrum\wallet.py", line 218, 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 1273, 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?