Exception when doing pubsub

Hi all,

I’ve established a connection and already created 5 user ,I’m try to create a node and publish some message so that these users can subscribe to that node.

I encountered a exception when I’m trying to do pubsub and I’ve googled this exception

but their situation is different with mine (smack 4.3)

can anyone help me what should I do or there is something I need to set ?

thank you!!

org.jivesoftware.smack.XMPPException$XMPPErrorException:
XMPP error reply received from pubsub.mydomain: XMPPError: bad-request - modify

            // Create a pubsub manager using an existing XMPPConnection
            PubSubManager mgr = PubSubManager.getInstance(connection);

            // Create the node
            LeafNode leaf = mgr.createNode("testNode");
            ConfigureForm form = new ConfigureForm(Type.submit);
            form.setAccessModel(AccessModel.open);
            form.setDeliverPayloads(false);
            form.setNotifyRetract(true);
            form.setPersistentItems(true);
            form.setPublishModel(PublishModel.open);

            leaf.sendConfigurationForm(form);
            
            // Get the node
            LeafNode node = mgr.getNode("testNode");
            String xmlPayload = "<test xmlns=\"pubsub:mydomain\">\r\n" + 
                                "    <testTitle>qweqweqwe</testTitle>\r\n" + 
                                "    <testContent>asdasdasda</testContent>\r\n" + 
                                "</test>";
								
            SimplePayload simplePayload = new SimplePayload(xmlPayload);
            PayloadItem<SimplePayload> item = new PayloadItem<>("testItem", simplePayload);
            node.publish(item);

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