Getting Status Code: 500 errors when accessing localstack Kinesis stream with Camel

Question

I'm receiving 500 status code errors when connecting with Camel to my localstack Kinesis stream. Accessing and putting msgs to the stream via awslocal works fine. So it's probably not a localstack issue.

Localstack

# Start localstack
DEBUG=1 SERVICES=kinesis AWS_CBOR_DISABLE=true CBOR_ENABLED=false localstack start

# Setup stream
awslocal kinesis create-stream --shard-count 4 --stream-name mystream

Java Config (I'm using Quarkus)

public void configure() {
        

        BasicAWSCredentials awsCreds = new BasicAWSCredentials(mystream.getAccessKeyId(), mystream.getSecretKey());
        AmazonKinesis client = AmazonKinesisClientBuilder.standard()
                .withCredentials(new AWSStaticCredentialsProvider(awsCreds))
                .withEndpointConfiguration(
                        new AwsClientBuilder.EndpointConfiguration(mystream.getServiceEndpoint(), mystream.getRegion()))
                .build();

        getContext().setTracing(true);

        getContext().getRegistry().bind("mystreamClient", client);

        from("aws-kinesis://mystream?amazonKinesisClient=mystreamClient&bridgeErrorHandler=true&shard-id=1").routeId("mystream1").log("Received mystream");
    }

Error msg: ERROR [org.apa.cam.pro.err.DefaultErrorHandler] (Camel (camel-1) thread #0 - aws-kinesis://mystream) Failed delivery for (MessageId: 76F94B329B1EE4F-0000000000000002 on ExchangeId: 76F94B329B1EE4F-0000000000000002). Exhausted after delivery attempt: 1 caught: com.amazonaws.services.kinesis.model.AmazonKinesisException: null (Service: AmazonKinesis; Status Code: 500; Error Code: null; Request ID: null)