After Upgrade Solution to latest version 16.2.5011, the messageObject we were using to display a warning message is not displaying the text.
On Client agnostic module and using Web.
Xafari.Utils.MessageObject.CreateMessageWarning( e.ShowViewParameters, Application, "Sold or Not Received", "Sample Error Text");
The popup window text content is blank.
I created my own NonPersistant Object and then following this Article, I was able to make my own Message Object and then it works.