Debezium server crashes when deleting a record from a SQLServer table (redis sink)

delete from emp where empno = 83 

2021-07-05 12:42:17,132 INFO [io.deb.ser.ConnectorLifecycle] (pool-7-thread-1) Connector completed: success = 'false', message = 'Stopping connector after error in the application's handler method: Unexpected data type 'null'', error = '{}': io.debezium.DebeziumException: Unexpected data type 'null'
 at io.debezium.server.BaseChangeConsumer.getString(BaseChangeConsumer.java:80)
 at io.debezium.server.redis.RedisStreamChangeConsumer.handleBatch(RedisStreamChangeConsumer.java:118)
 at io.debezium.embedded.ConvertingEngineBuilder.lambda$notifying$2(ConvertingEngineBuilder.java:83)
 at io.debezium.embedded.EmbeddedEngine.run(EmbeddedEngine.java:821)
 at io.debezium.embedded.ConvertingEngineBuilder$2.run(ConvertingEngineBuilder.java:188)
 at io.debezium.server.DebeziumServer.lambda$start$1(DebeziumServer.java:145)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
 at java.base/java.lang.Thread.run(Thread.java:829)