ValueError: pvals < 0, pvals > 1 or pvals contains NaNs

[hc20k]

When setting up this bot with my discord server, I get this exception randomly whenever someone sends the bot a message:

divide
  p_values = distance_magnitudes / sums
/Users/hwashere/Desktop/PROJECTS/python-copebot/common/ml.py:10: RuntimeWarning: divide by zero encountered in log
  preds = np.log(preds) / temperature
Traceback (most recent call last):
  File "copebot_python_edition.py", line 289, in <module>
    cpe.start(retrain_structure=args.retrain_structure, retrain_markov=args.retrain_markov)
  File "copebot_python_edition.py", line 95, in start
    self._main()
  File "copebot_python_edition.py", line 247, in _main
    reply = connector.generate(message, doc=doc)
  File "/Users/hwashere/Desktop/PROJECTS/python-copebot/connectors/connector_common.py", line 164, in generate
    return self._reply_generator.generate(message, doc)
  File "/Users/hwashere/Desktop/PROJECTS/python-copebot/connectors/bot_instance.py", line 17, in generate
    reply = ConnectorReplyGenerator.generate(self, message, doc, ignore_topics=[BOT_USERNAME.split('#')[0]])
  File "/Users/hwashere/Desktop/PROJECTS/python-copebot/connectors/connector_common.py", line 59, in generate
    sentences = generator.generate(db=self._markov_model)
  File "/Users/hwashere/Desktop/PROJECTS/python-copebot/markov_engine.py", line 364, in generate
    if not self._generate_words(db):
  File "/Users/hwashere/Desktop/PROJECTS/python-copebot/markov_engine.py", line 504, in _generate_words
    handle_projections()
  File "/Users/hwashere/Desktop/PROJECTS/python-copebot/markov_engine.py", line 473, in handle_projections
    word_choice_idx = temp(p_values, temperature=MARKOV_MODEL_TEMPERATURE)
  File "/Users/hwashere/Desktop/PROJECTS/python-copebot/common/ml.py", line 13, in temp
    probas = np.random.multinomial(1, preds, 1)
  File "mtrand.pyx", line 3863, in numpy.random.mtrand.RandomState.multinomial
  File "common.pyx", line 323, in numpy.random.common.check_array_constraint
ValueError: pvals < 0, pvals > 1 or pvals contains NaNs```

Any idea what could be causing this crash?