SAPUI5 iView does not work?

Hi,

I'm creating SAPUI5 applications that I want to expose through SAP Portal. As we are on SAP Portal 7.3 SP9 I'm able to create SAPUI5 iviews using steps described here: http://help.sap.com/saphelp_nw73/helpdata/en/7d/f8218433ad454dad5fddd189829fad/content.htm

But when I preview the iview it just spins endlessly (never loads) as shown in picture below.

If I run the application outside an iview it works fine ie. using hostname:port/appname/index.html

Any ideas what could be wrong? I can't see anything in log files either

Br Jan