SAP FIORI - Unable to start App

Hi guys,

I just created a littel HelloWorld SAPUI5 application and I wanted to launch it from the FIORI launchpad. So I created everything step by step: catalog,  target mapping, static app, group,  I assigned the group / catalog to a new created role via  transaction PFCD, semantic object etc..

I basically followed this guide:

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/80af9b19-9cde-3110-83b0-f450f2b20f74?QuickLink=index&overridelayout=true&59407987716266

Everything seems to work. But when I try to start the app from the launchpad I always get this message:

Does anyone has an idea why this is not working? Are there any logs that could maybe help me...?

Thanks

Goluef