AutoGen errors / Version
ValueError: Message type StructuredMessage[AgentResponse] is not registered.
Cause
Since autogen-agentchat 0.6.4 the Teams integration changed message-type registration; agents using output_content_type add custom StructuredMessage subtypes never registered with the group-chat container, so logging raises ValueError.
Fix
Downgrade to autogen-agentchat==0.6.2 as a temporary workaround. Remove output_content_type from affected agents if the structured type is not strictly required. Watch issues #6795 and #6983 for an official patch that registers custom message types at group-chat init.
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