Traceback (most recent call last):
  File "electrum/gui/qt/send_tab.py", line 262, in spend_max
  File "electrum/gui/qt/send_tab.py", line 255, in <lambda>
  File "electrum/util.py", line 483, in do_profile
  File "electrum/wallet.py", line 1934, 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 1183, in func_wrapper
  File "electrum/blockchain.py", line 479, in read_header
Exception: Expected to read a full header. This was only 0 bytes