File "./lib/util.py", line 856, in run_with_except_hook
    run_original(*args2, **kwargs2)
  File "./lib/network.py", line 1040, in run
    self.wait_on_sockets()
  File "./lib/network.py", line 1022, in wait_on_sockets
    self.process_responses(interface)
  File "./lib/network.py", line 689, in process_responses
    self.process_response(interface, response, callbacks)
  File "./lib/network.py", line 629, in process_response
    self.on_get_header(interface, response)
  File "./lib/network.py", line 979, in on_get_header
    raise Exception(interface.mode)