TypeError: 'NoneType' object is not subscriptable running the chess example

[techybolek]

When running the chess example https://github.com/microsoft/autogen/blob/main/notebook/agentchat_chess.ipynb
I get an error:

TypeError: 'NoneType' object is not subscriptable

I've tried both in colab as well as on my local machine.
Full stack:

Player black (to Player white):

Your turn.

---

r n b q k b n r\np p p p p p p p\n. . . . . . . .\n. . . . . . . .\n. . . . P . . .\n. . . . . . . .\nP P P P . P P P\nR N B Q K B N R

<path d="M 24,18 C 24.38,20.91 18.45,25.37 16,27 C 13,29 13.18,
Player white (to Player black):

I'll start with the classic opening, <my_player_name>. e2e4. Let's see how you respond to this.

---

---

TypeError Traceback (most recent call last)
in <cell line: 1>()
----> 1 player_black.initiate_chat(player_white, message="Your turn.")

51 frames
in _generate_board_reply(self, messages, sender, config)
30 # extract a UCI move from player's message
31 reply = self.generate_reply(self.correct_move_messages[sender] + [message], sender, exclude=[BoardAgent._generate_board_reply])
---> 32 uci_move = reply if isinstance(reply, str) else str(reply["content"])
33 try:
34 self.board.push_uci(uci_move)

TypeError: 'NoneType' object is not subscriptable

[sonichi]

Have you modified anything in the notebook? It works in my test.

[techybolek]

All I did was replace {name} placeholders with names but I'll double check.

[sonichi]

oh you don't need to change that. It will be instantiated automatically.