I am able to only "view" the tiles. Will require a little-bit-of-debugging as to why-the-tile opens another-window and shows blank screen.
As stated by Joerg, I see error-log in the window browser console.
Anyways, for now my priority is to focus on checking the NEW Apps for S/4HANA 1511, hence focusing on the 3 Apps - Sales Order Fulfillment & happy to say, I do see some valid data in them... :-)
Regards,
MP