[BUG]RAG is not available in v2.3.3

[HirokiNakatani]

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Describe the bug

I created a RAG bot with source in v2.3.3 and when I chat, an error occurs and it does not function.
[error messsage]
Failed to run stream handler: An error occurred (ValidationException) when calling the ConverseStream operation: The model returned the following errors: The guardrail can't assess the content in the guardContent field. The guardrail configuration is missing. Specify the guardrailConfig field and try again.

To Reproduce

Steps to reproduce the behavior:

1. Create RAG bot with source
2. Start chatting
   
3. An error occurred

Screenshots

Additional context

Add any other context about the problem here.