Unable to Passing Data Between Widgets

Hi All

I'm trying to follow the example "Passing Data Between Widgets" from this link: https://help.hybris.com/1808/hcd/8be2448886691014bf61e8730c819771.html#loio8be2448886691014bf61e8730c819771.

I have created my controller, the definition.xml and the zul file. I'm able to add the widget to my custom backoffice and when I click on the "Send" button I'm able to debug the controller and see that the value is been send to "outgoingMsg".

However never get the value in @SocketEvent(socketId = "incomingMsg") and for this reason the label on the page is never been updated.

This is the code I have in my local..

---------------------------------------------CONTROLLER -----------------------------------------------------------------------------

public class MyChatController extends DefaultWidgetController

{ private Label lastMsgLabel; private Textbox msgInput;

 @ViewEvent(componentID = "sendBtn", eventName = Events.ON_CLICK)
 public void sendMsg()
 {
     sendOutput("outgoingMsg", msgInput.getText());

 }

 @SocketEvent(socketId = "incomingMsg")
 public void updateTranscript(final String msg)
 {
     lastMsgLabel.setValue(msg);
 }

}

-------------------------------------------------------------------definition.xml-------------------------------------------------------

 <name>My Chat</name>
 <description>My chat widget.</description>
 <defaultTitle>My chat</defaultTitle>
 <author>Me</author>
 <version>0.1</version>
 
 <controller class="org.sigmabackoffice.widgets.mychat.MyChatController"/>
 
 <sockets>
     <input type="java.lang.String" id="incomingMsg"/>
     <output type="java.lang.String" id="outgoingMsg"/>
 </sockets>
 
 <keywords>
     <keyword>Chat</keyword>
 </keywords>

-------------------------------------------------------------------mychat.zul-------------------------------------------------------

 <div>
     <textbox id="msgInput"/>
     <button id="sendBtn" label="Send"/>
 </div>
 <div>
     <label id="lastMsgLabel" value="No message."></label>
 </div>

I'm attaching the structure of my local project and how the widget looks like, any help is appreciated.