hyperopt SMA strategy leaves empty list

[l8nit3tr0ubl3]

Hello, I have managed to get this to run on testnet, great work by the way :)
However, when attempting to use the hyperopt option, the optimum settings don't seem to be added to the list, causing a null object and an error. (at least this is my understanding)

Error below:

2019-09-29 13:09:07,389 - INFO - tpe_transform took 0.002560 seconds
2019-09-29 13:09:07,392 - INFO - TPE using 199/199 trials with best loss inf
2019-09-29 13:09:07,507 - INFO - Params : {'fast_len': 3.0, 'slow_len': 22.0}
100%|████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 200/200 [00:18<00:00, 10.63it/s, best loss: ?]
Traceback (most recent call last):
  File "main.py", line 22, in <module>
    bot.run()
  File "/home/linux/build/ta-lib/ebisu/src/bot.py", line 109, in run
    self.params_search()
  File "/home/linux/build/ta-lib/ebisu/src/bot.py", line 99, in params_search
    best_params = fmin(objective, self.options(), algo=tpe.suggest, trials=trials, max_evals=200)
  File "/home/linux/.local/lib/python3.6/site-packages/hyperopt/fmin.py", line 388, in fmin
    show_progressbar=show_progressbar,
  File "/home/linux/.local/lib/python3.6/site-packages/hyperopt/base.py", line 639, in fmin
    show_progressbar=show_progressbar)
  File "/home/linux/.local/lib/python3.6/site-packages/hyperopt/fmin.py", line 409, in fmin
    return trials.argmin
  File "/home/linux/.local/lib/python3.6/site-packages/hyperopt/base.py", line 590, in argmin
    best_trial = self.best_trial
  File "/home/linux/.local/lib/python3.6/site-packages/hyperopt/base.py", line 585, in best_trial
    best = np.argmin(losses)
  File "<__array_function__ internals>", line 6, in argmin
  File "/home/linux/.local/lib/python3.6/site-packages/numpy/core/fromnumeric.py", line 1222, in argmin
    return _wrapfunc(a, 'argmin', axis=axis, out=out)
  File "/home/linux/.local/lib/python3.6/site-packages/numpy/core/fromnumeric.py", line 58, in _wrapfunc
    return _wrapit(obj, method, *args, **kwds)
  File "/home/linux/.local/lib/python3.6/site-packages/numpy/core/fromnumeric.py", line 47, in _wrapit
    result = getattr(asarray(obj), method)(*args, **kwds)
ValueError: attempt to get argmin of an empty sequence