balance_rsgroup NullPointerException

hbase shell

hbase(main):001:0> balance_rsgroup 'default'

ERROR: java.io.IOException
        at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:469)
        at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:133)
        at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:338)
        at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:318)
Caused by: java.lang.NullPointerException

hbase server log

2023-01-16 18:53:51,418 INFO  [RpcServer.default.RWQ.Fifo.read.handler=315,queue=85,port=16000] rsgroup.RSGroupAdminEndpoint: Client=xxxxx balance rsgroup, group=default
2023-01-16 18:53:51,421 ERROR [RpcServer.default.RWQ.Fifo.read.handler=315,queue=85,port=16000] ipc.RpcServer: Unexpected throwable object
java.lang.NullPointerException