Track Sales Orders - no Sales Order to select

Hi SCN community,

after a while of implemenation of our first SAP Fiori App "Track Sales Orders", we get some Customer details from our SAP backend system:

But then we can't get one step ahead - to choose a right Sales Order.

Can somebody give me a hint, where I can start the debugger ?

Thanks a lot in advance,

Best Regards,

Florian