After installing 11205 build a rules script does not work correctly.

After installing 11205 build a rules script does not work correctly.

I have script in the Incident Management - Field and Form Rules - On Form Submit :




Listing of script:

/*Site to description*/
var old_description_content=$CS.getDescription();
var SiteText=$CS.getText("SITE");
var new_description_content= old_description_content + '<br>' + 'Кабинет: ' + SiteText + '<br>';
if($CS.isFormSubmit()){
  $CS.setDescription(new_description_content);


But after installing 11205 build this script does not work correctly - "Room" is undefined: