AttributeError: 'NoneType' object has no attribute 'blockchain'

[wo01]

Crash Report

This crash report was reported through the automatic crash reporting system 🤖

Traceback

  File "/home/tetsuo/electrum-koto/gui/qt/main_window.py", line 634, in timer_actions
    self.update_wallet()
  File "/home/tetsuo/electrum-koto/gui/qt/main_window.py", line 750, in update_wallet
    self.update_tabs()
  File "/home/tetsuo/electrum-koto/gui/qt/main_window.py", line 755, in update_tabs
    self.address_list.update()
  File "/home/tetsuo/electrum-koto/gui/qt/util.py", line 505, in update
    self.on_update()
  File "/home/tetsuo/electrum-koto/gui/qt/address_list.py", line 98, in on_update
    is_used = self.wallet.is_used(address)
  File "/home/tetsuo/electrum-koto/lib/wallet.py", line 1363, in is_used
    c, u, x = self.get_addr_balance(address)
  File "/home/tetsuo/electrum-koto/lib/wallet.py", line 686, in get_addr_balance
    received, sent = self.get_addr_io(address)
  File "/home/tetsuo/electrum-koto/lib/wallet.py", line 647, in get_addr_io
    h = self.get_address_history(address)
  File "/home/tetsuo/electrum-koto/lib/wallet.py", line 754, in get_address_history
    tx_height = self.get_tx_height(tx_hash)[0]
  File "/home/tetsuo/electrum-koto/lib/wallet.py", line 487, in get_tx_height
    conf = max(self.get_local_height() - height + 1, 0)
  File "/home/tetsuo/electrum-koto/lib/wallet.py", line 480, in get_local_height
    return self.network.get_local_height() if self.network else self.storage.get('stored_height', 0)
  File "/home/tetsuo/electrum-koto/lib/network.py", line 1063, in get_local_height
    return self.blockchain().height()
  File "/home/tetsuo/electrum-koto/lib/network.py", line 1032, in blockchain
    if self.interface and self.interface.blockchain is not None:

AttributeError: 'NoneType' object has no attribute 'blockchain'

Reporter

This issue was reported by 2 user(s):

Electrum Version	Operating System	Wallet Type	Locale
3.1.3-140-g8380e1d-dirty	Linux-4.4.0-119-generic-x86_64-with-Ubuntu-16.04-xenial	2of4	ja_JP
3.1.3	Windows-10-10.0.17134-SP0	standard	ja_JP

Additional Information

The reporting user(s) did not provide additional information.