File "/tmp/.mount_electrR2FB8c/usr/lib/python3.6/site-packages/electrum/gui/qt/network_dialog.py", line 67, in on_update
    self.nlayout.update()
  File "/tmp/.mount_electrR2FB8c/usr/lib/python3.6/site-packages/electrum/gui/qt/network_dialog.py", line 386, in update
    self.nodes_list_widget.update(self.network)
  File "/tmp/.mount_electrR2FB8c/usr/lib/python3.6/site-packages/electrum/gui/qt/network_dialog.py", line 114, in update
    name = b.get_name()
  File "/tmp/.mount_electrR2FB8c/usr/lib/python3.6/site-packages/electrum/blockchain.py", line 235, in get_name
    return self.get_hash(self.get_max_forkpoint()).lstrip('0')[0:10]
  File "/tmp/.mount_electrR2FB8c/usr/lib/python3.6/site-packages/electrum/blockchain.py", line 487, in get_hash
    header = self.read_header(height)
  File "/tmp/.mount_electrR2FB8c/usr/lib/python3.6/site-packages/electrum/blockchain.py", line 186, in func_wrapper
    return func(self, *args, **kwargs)
  File "/tmp/.mount_electrR2FB8c/usr/lib/python3.6/site-packages/electrum/blockchain.py", line 457, in read_header
    self.assert_headers_file_available(name)
  File "/tmp/.mount_electrR2FB8c/usr/lib/python3.6/site-packages/electrum/blockchain.py", line 421, in assert_headers_file_available
    raise FileNotFoundError('Cannot find headers file but headers_dir is there. Should be at {}'.format(path))