Bedrock connection showing error

ool = CSVSearchTool(csv=r'path/to/file.csv',
            config=dict(
                llm=dict(
                    provider="aws_bedrock", 
                    config=dict(
                        model="amazon.titan-text-express-v1",
                    ),
                ),
                embedder=dict(
                    provider="aws_bedrock", 
                    config=dict(
                        model="amazon.titan-embed-text-v2:0",
                    ),
                ),
            )
        )