Почему при запуске grpc сервера с телефона через компьютер не получается подключится?

 Exception in thread "main" io.grpc.StatusRuntimeException: UNAVAILABLE: io exception 
at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:235) 
at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:216) 
at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:141) 
at com.forest.grpc.RemoteControlGrpc$RemoteControlBlockingStub.greeting(RemoteControlGrpc.java:156) 
at com.forest.Client.main(Client.java:19) 
Caused by: io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/[0:0:0:0:0:0:0:1]:7777 
Caused by: java.net.ConnectException: Connection refused: no further information 
at java.base/sun.nio.ch.Net.pollConnect(Native Method) 
at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:669) 
at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:944) 
at io.grpc.netty.shaded.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327) 
at io.grpc.netty.shaded.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:336) 
at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685) 
at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632) 
at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549) 
at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511) 
at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918) 
at io.grpc.netty.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) 
at io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) 
at java.base/java.lang.Thread.run(Thread.java:831) 
 
Process finished with exit code 1