You don’t have access to the isEsacalated field on the case object. This is why all the javascript is failing.
In Group and Professional Edition the only way you get access to fields is by putting them in the standard page layout. I’m not going to do this for you because I don’t want to impact your users. But as soon as you put the field in your layout - the Skuid pages should work for you.
But as you go forward, just know that in order to gain access to fields in your skuid pages -you will need to put them in standard layouts first. (This is not the case with Enterprize edition and higher - where field level access is governed at the profile level).
