Kafka 4.0.0 and later introduces new APIs and removes support for previous client libraries.
Event Endpoint Management version 11.8.1 and later uses Kafka 4.3.0.
The Event Gateway reports if any clients are calling deprecated APIs and presents a warning message in the Event Endpoint Management UI.
Contact the client application owners and advise them to upgrade their Kafka client library to version 4.3.0 or later.