Traceback (most recent call last):
  File "electrum\gui\qt\send_tab.py", line 579, in do_pay_or_get_invoice
  File "electrum\gui\qt\send_tab.py", line 606, in do_pay_invoice
  File "electrum\gui\qt\send_tab.py", line 323, in pay_onchain_dialog
  File "electrum\gui\qt\confirm_tx_dialog.py", line 622, in __init__
  File "electrum\gui\qt\util.py", line 376, in __init__
  File "electrum\gui\qt\confirm_tx_dialog.py", line 123, in update
  File "electrum\gui\qt\confirm_tx_dialog.py", line 641, in update_tx
  File "electrum\gui\qt\send_tab.py", line 315, in <lambda>
  File "electrum\util.py", line 483, in do_profile
  File "electrum\wallet.py", line 1936, in make_unsigned_transaction
  File "electrum\wallet.py", line 210, in get_locktime_for_new_transaction
  File "electrum\blockchain.py", line 491, in is_tip_stale
  File "electrum\blockchain.py", line 487, in header_at_tip
  File "electrum\util.py", line 1190, in func_wrapper
  File "electrum\blockchain.py", line 479, in read_header
Exception: Expected to read a full header. This was only 0 bytes