View connected user name

Hello to all

I have a problem I can not see the name connected of the user in a text box.

The strange thing is that with the ThingWorx 7.2 version working properly, after upgrade to version 7.4, it does not work anymore.

Does anyone know how and how to solve the problem?

Here's an example

Click "View Mashup" and I can see the bound label to "name" is blank

Thanks in advance

Antonio