nacos find provider error

[candyYu]

I use dubbo with nacos as regcenter and metadata-center then i got error next

2021-04-29 17:33:45.423 [http-nio-8012-exec-1] ERROR c.t.cloud.flash.handler.GlobalExceptionHandler Line:47 - class org.apache.dubbo.rpc.RpcException: Failed to invoke the method getMessageList in the service com.trioly.cloud.flash.api.IMessageRpcService. No provider available for the service com.trioly.cloud.flash.api.IMessageRpcService from registry 127.0.0.1:9090 on the consumer 172.16.1.115 using the dubbo version 2.7.6. Please check if the providers have been started and registered.
org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.checkInvokers(AbstractClusterInvoker.java:282)
org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:59)
org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:259)
org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47)
org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92)
org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:82)

[AlbumenJ]

It seems as if you haven start a provider or the provider's registry is not 127.0.0.1:9090