Traceback (most recent call last):
  File "electrum\gui\qt\send_tab.py", line 573, in do_pay_or_get_invoice
  File "electrum\gui\qt\send_tab.py", line 585, in do_pay_invoice
  File "electrum\gui\qt\send_tab.py", line 237, in pay_onchain_dialog
  File "electrum\gui\qt\confirm_tx_dialog.py", line 183, in __init__
  File "electrum\gui\qt\util.py", line 357, in __init__
  File "electrum\gui\qt\confirm_tx_dialog.py", line 86, in update_tx
  File "electrum\gui\qt\send_tab.py", line 227, in <lambda>
  File "electrum\wallet.py", line 1656, 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 1268, in func_wrapper
  File "electrum\blockchain.py", line 474, in read_header
Exception: Expected to read a full header. This was only 0 bytes