[basex-talk] web application on a local installation ?

Hi sorry to ask a basic questions, but I'm a newbie that doesn't always understand all the pre-requisite in the documentation. If I can't find help here, just tell me. I tried to install a local instance of baseX and use the web application features. I work on mac and installed baseX with homebrew after changing the password of the admin user, and creating a database, I launched the httpserver and typed in my browser http://localhost:8984/ the result is : HTTP ERROR: 503 Problem accessing /webapp. Reason: Service Unavailable what am I missing ? is it even possible to use a web app on a local computer ? thanks in advance for your help... EM