Milo cannot connect to OPCUA

[DreamToffee]

I am using a PLC produced by inovance, and I can successfully connect using UaExpert. However, when I try to connect using milo, it prompts me with 'java. net' Unknown HostException: I am not aware of such a host. (inovance)
I have tried connecting to OPC tcp://milo.digitalpetri.com:62541/milo , can be connected

[DreamToffee]

public OpcUaClient connectOpcUaServer(String ip, int port, String suffix) throws Exception {
String endPointUrl = "opc.tcp://192.168.1.20:4840";
OpcUaClient opcUaClient = OpcUaClient.create(
endPointUrl,
endpoints ->
endpoints.stream()
.filter(e -> e.getSecurityPolicyUri().equals(SecurityPolicy.None.getUri()))
.findFirst(),
configBuilder ->
configBuilder
.setApplicationName(LocalizedText.english("eclipse milo opc-ua client"))
.setApplicationUri("urn:eclipse:milo:examples:client")
//访问方式
.setIdentityProvider(new AnonymousProvider())
.setRequestTimeout(UInteger.valueOf(5000))
.build()
);
opcUaClient.connect().get();
Thread.sleep(2000); // 线程休眠一下再返回对象，给创建过程一个时间。
return opcUaClient;
}

[DreamToffee]

Exception in thread "main" java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.net.UnknownHostException: 不知道这样的主机。 (inovance)
at com.plc.plcservice.PlcServiceApplication.main(PlcServiceApplication.java:20)
Caused by: java.util.concurrent.ExecutionException: java.net.UnknownHostException: 不知道这样的主机。 (inovance)
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2073)
at com.plc.plcservice.utils.OpcUaClientService.connectOpcUaServer(OpcUaClientService.java:38)
at com.plc.plcservice.utils.OpcUaClientService.connectOpcUaServer(OpcUaClientService.java:15)
at com.plc.plcservice.PlcServiceApplication.main(PlcServiceApplication.java:16)
Caused by: java.net.UnknownHostException: 不知道这样的主机。 (inovance)
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:933)
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1534)
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:852)
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1524)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1381)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1305)
at java.base/java.net.InetAddress.getByName(InetAddress.java:1255)
at io.netty.util.internal.SocketUtils$8.run(SocketUtils.java:156)
at io.netty.util.internal.SocketUtils$8.run(SocketUtils.java:153)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:569)
at io.netty.util.internal.SocketUtils.addressByName(SocketUtils.java:153)
at io.netty.resolver.DefaultNameResolver.doResolve(DefaultNameResolver.java:41)
at io.netty.resolver.SimpleNameResolver.resolve(SimpleNameResolver.java:61)
at io.netty.resolver.SimpleNameResolver.resolve(SimpleNameResolver.java:53)
at io.netty.resolver.InetSocketAddressResolver.doResolve(InetSocketAddressResolver.java:55)
at io.netty.resolver.InetSocketAddressResolver.doResolve(InetSocketAddressResolver.java:31)
at io.netty.resolver.AbstractAddressResolver.resolve(AbstractAddressResolver.java:106)
at io.netty.bootstrap.Bootstrap.doResolveAndConnect0(Bootstrap.java:220)
at io.netty.bootstrap.Bootstrap.access$000(Bootstrap.java:47)
at io.netty.bootstrap.Bootstrap$1.operationComplete(Bootstrap.java:189)
at io.netty.bootstrap.Bootstrap$1.operationComplete(Bootstrap.java:175)
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:590)
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:557)
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:492)
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:636)
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:625)
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:105)
at io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:84)
at io.netty.channel.AbstractChannel$AbstractUnsafe.safeSetSuccess(AbstractChannel.java:988)
at io.netty.channel.AbstractChannel$AbstractUnsafe.register0(AbstractChannel.java:515)
at io.netty.channel.AbstractChannel$AbstractUnsafe.access$200(AbstractChannel.java:428)
at io.netty.channel.AbstractChannel$AbstractUnsafe$1.run(AbstractChannel.java:485)
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:994)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base/java.lang.Thread.run(Thread.java:833)