The script that overflows the automatic text is not working.

If there is no blank page in the back, create a new blank pages, and then expand the overflow text.
If there is a blank page in the back, the overflow text is directly expanded.

There is a script, but it is not working now.
Can you help me modify it?
Thank you

var myDoc = app.documents[0];
myDoc.textPreferences.smartTextReflow = true;
myDoc.textPreferences.deleteEmptyPages = false;
myDoc.textPreferences.limitToMasterTextFrames = false;
myDoc.textPreferences.addPages = AddPageOptions.END_OF_DOCUMENT;