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Apache Kafka consumer consumes messages with "partition" option, but not with "group" option

This is a copy of a topic I posted in stackoverflow (https://stackoverflow.com/questions/76458064/apache-kafka-consumer-consumes-messages-with-partition-option-but-not-with-g), where I didn't get any answer yet. Searching the web did not yield any helpful reults either. Hence, I am addressing to this mailing list:

I am running a plain Apache Kafka server (version 3.4.1) which I would like to connect to a Telegraf consumer. The Telegraf ```[[inputs.kafka_consumer]]``` plugin has the option to consume by Kafka "group". When staring Telegraf, I get an error message

[inputs.kafka_consumer] Error in plugin: consume: kafka server: Request was for a consumer group that is not coordinated by this broker

Hence, I started to investigate my setup by using the Kafka console tools and found that when executing

./kafka-console-consumer.sh --bootstrap-server myserver:9092 --topic test --partition 0

and sending messages via ```kafka-console-consumer.sh```, these messages pop up in the console "consumer" window as expected.

In contrast to this, when I run

./kafka-console-consumer.sh --bootstrap-server myserver:9092 --topic test --group my-group

nothing happens in the "consumer" window. Furthermore, the command

./kafka-consumer-groups.sh --bootstrap-server myserver:9092 --list

yields nothing.

What do I have to do to cause the consumer with the "group" option to "see" the messages produced to the topic "test"? Ultimately, how can I solve the Telegraf error?

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