I have finished all the build-agentic-powered-app journy but I am stuck on the 3rd Agent: the underwriter agent, debugging and checking logs I have seen that Amazon Bedrocks throw this error:

"

Failed to call AI model. Status code: BadRequest. The Amazon Bedrock AI model provider returned this message: 

"BedrockException - {"message":"A conversation must start with a user message. 

Try again with a conversation that starts with a user message."} . 

Pass in default user message via `completion(..,user_continue_message=)` or 

enable `litellm.modify_params=True`. 

For Proxy: do via `litellm_settings::modify_params: True` or 

user_continue_message under `litellm_params`." (OS-ABRS-FM-40001)"

Please, there is somebody who has fight with this problem before? DId you get solve it?

Thanks all in advance!