After deploying Evaluation example I can see it in Deployments and in Process Definitions (I fallowed this tutorial) so everything looks just fine.
Than I`m running Start Action under Process Definitions, the Form dialog popsup I am filling both fields (Employee, Reason) and clicking the "play" button. Nothing happens. I can see that page is reloading (about one second) popup does not disappear, fields are still filled with values which I just typed a moment ago.
Same thing goes with Hiring example.
I do not have any problems with async and weather examples! Those are working just fine.
could you attach server.log (preferably after clean installation) when executing Evaluation process. Would be good as well to get more details on your environment and java version.