Error in the MC Agent

[LorenzoM1997]

Have an error when running custom.py with the MCAgent predicting RainbowAgent versus the real RainbowAgent.

  my_belief /= my_belief.sum()
Traceback (most recent call last):
  File "custom_rl.py", line 184, in <module>
    runner.run()
  File "custom_rl.py", line 117, in run
    action = agent.act(ob, self.env)
  File "/home/lorenzo/hanabi/agents/mc_agent.py", line 245, in act
    other_vec, game_state.cur_player())
  File "/home/lorenzo/hanabi/agents/mc_agent.py", line 80, in sampled_vector
    self.belief.add_known(card)  # add the knowledge of the card
  File "/home/lorenzo/hanabi/bayes.py", line 41, in add_known
    self.full_know -= card
TypeError: ufunc 'subtract' output (typecode 'O') could not be coerced to provided output parameter (typecode 'B') according to the casting rule ''same_kind''```