为什么Seata 服务端成功注册到阿里云 Nacos ，但微服务客户端启动连接时报错？

错误堆栈：

[2023-07-31 18:09:39.899] --- [ main] i.s.c.r.netty.NettyClientChannelManager [ERROR] : no available service 'null' found, please make sure registry config correct
[2023-07-31 18:09:40.891] --- [naming.updater.0] com.alibaba.nacos.common.remote.client [ERROR] : Send request fail, request = ServiceQueryRequest{headers={}, requestId='null'}, retryTimes = 0, errorMessage = Trigger push empty protection for Service{namespace='test', group='SEATA_GROUP', name='seata-server', ephemeral=true, revision=0}
[2023-07-31 18:09:40.894] --- [naming.updater.0] com.alibaba.nacos.common.remote.client [ERROR] : Send request fail, request = ServiceQueryRequest{headers={}, requestId='null'}, retryTimes = 1, errorMessage = Trigger push empty protection for Service{namespace='test', group='SEATA_GROUP', name='seata-server', ephemeral=true, revision=0}
[2023-07-31 18:09:40.897] --- [naming.updater.0] com.alibaba.nacos.common.remote.client [ERROR] : Send request fail, request = ServiceQueryRequest{headers={}, requestId='null'}, retryTimes = 2, errorMessage = Trigger push empty protection for Service{namespace='test', group='SEATA_GROUP', name='seata-server', ephemeral=true, revision=0}
[2023-07-31 18:09:40.987] --- [naming.updater.0] com.alibaba.nacos.client.naming [WARN ] : [NA] failed to update serviceName: SEATA_GROUP@@seata-server
com.alibaba.nacos.api.exception.NacosException: Request nacos server failed:
at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.requestToServer(NamingGrpcClientProxy.java:288)
at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.queryInstancesOfService(NamingGrpcClientProxy.java:168)
at com.alibaba.nacos.client.naming.remote.NamingClientProxyDelegate.queryInstancesOfService(NamingClientProxyDelegate.java:110)
at com.alibaba.nacos.client.naming.core.ServiceInfoUpdateService$UpdateTask.run(ServiceInfoUpdateService.java:185)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: com.alibaba.nacos.api.exception.NacosException: Trigger push empty protection for Service{namespace='test', group='SEATA_GROUP', name='seata-server', ephemeral=true, revision=0}
at com.alibaba.nacos.common.remote.client.RpcClient.request(RpcClient.java:670)
at com.alibaba.nacos.common.remote.client.RpcClient.request(RpcClient.java:631)
at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.requestToServer(NamingGrpcClientProxy.java:278)
... 9 common frames omitted