I have been developing an app from the developer edition of web appbuilder and deployed it in our Web server (Tomcat) it seems to work with out any problem from our organizations intranet and internet infrastracture. But when we tried it at home from our own machine it appears to hang forever with the blue sreen (loading screen). Here are the error report from the console of chrome and Firefox.
From Chrome (2 error report)
Failed to load resource: the server responded with a status of statisticsUtils.js 403 (Forbidden)