When generating predictions, eval_onelayer crashes on a KeyError

[cglewis]

Traceback (most recent call last):
  File "eval_OneLayer.py", line 210, in <module>
    instance.main()
  File "eval_OneLayer.py", line 116, in main
    source_mac, timestamps[0])
  File "/usr/local/lib/python3.5/dist-packages/poseidonml/common.py", line 159, in get_previous_state
    state[b'representation'].decode('ascii'))
KeyError: b'representation'