File "electrum\util.py", line 882, in run_with_except_hook
  File "electrum\network.py", line 1085, in run
  File "electrum\network.py", line 1067, in wait_on_sockets
  File "electrum\network.py", line 719, in process_responses
  File "electrum\network.py", line 624, in process_response
  File "electrum\network.py", line 1112, in on_notify_header
  File "electrum\blockchain.py", line 96, in check_header
  File "electrum\blockchain.py", line 149, in check_header
  File "electrum\blockchain.py", line 316, in get_hash
  File "electrum\blockchain.py", line 300, in read_header