Does the Functionality of Standard Cancel button will change with the version of mendix modeler??

Hi,

Previously, I developed my application in 6.3.1 version of mendix modeler. And I used standard Cancel button to cancel the pop-up or some screens. Recently, I updated my modeler version to 6.10.4 . Currntly I am working on this modeler. Now when I tried to cancel the screen, Error is occurring. "
java.lang.IllegalArgumentException: requirement failed: mxObject should not be null ". This is the error I have. Please let me know why I am facing this issue... and please suggest me if there is any alternative for this issue..

Thanks,

Venkat.