AWS MSK connector Mongodb

There is an issue with the connector Code: InvalidInput.InvalidConnectorConfiguration Message: The connector configuration is invalid. Message: Connector configuration is invalid and contains the following 2 error(s): Invalid value io.confluent.connect.avro.AvroConverter for configuration key.converter: Class io.confluent.connect.avro.AvroConverter could not be found. Invalid value io.confluent.connect.avro.AvroConverter for configuration value.converter: Class io.confluent.connect.avro.AvroConverter could not be found.