Of course I try it in chrome browser. But it shows "can't load process designer" and then it shows a dialog ("Intalio|Process Designer" "please wait while loading...").
Do you know localhost:8080/designer/editor.html is contained in which war, jbpm-gwt-console.war, or jbpm-gwt-console-server.war?
I will check it exists or not.
By the way, have you downloaded the source code for jbpm5? And in the source code krisv-jbpm\jbpm-gwt, I don't see any webpage of jbpm5!!!! Very strange!