techeability can't be added to MultimodalConversableAgent

[zuitbjc1096]

What feature would you like to be added?

When I want't add teachability to MultimodalConversableAgent, it appears TypeError,
teachability.py", line 87, in add_to_agent
agent.system_message
TypeError: can only concatenate list (not "str") to list

After I change the code to fit different tye, it raise another ValueError:
conversable_agent.py", line 862, in _process_received_message
raise ValueError(
ValueError: Received message can't be converted into a valid ChatCompletion message. Either content or function_call must be provided.

Why is this needed?

Do you have any plan to add the teachability to MultimodalConversableAgent?

[jackgerrits]

@rickyloynd-microsoft does teachability support MultimodalConversableAgent in 0.2?